Our team of reporters mark your cards for this week's games; will you follow their advice or go your own way?
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As ever, UEFA.com's Europe-wide team of reporters has been scouring the statistics and form guides to bring you the best tips from each of the 32 group stage contenders for matchday four. Read on, then make your changes accordingly!
Arsenal (Andy Brassell, @UEFAcomAndyB)
Alex Oxlade-Chamberlain (MF, €6.0m)
After a strong (and goalscoring) performance in the first match against Ludogorets, the England midfielder has continued his good form, setting up the first for Alexis Sánchez in Saturday's win at Sunderland. He has the look of 'bargain of the round' about him.
Atlético Madrid (Joe Walker, @UEFAcomJoeW)
Yannick Carrasco (MF, €7.0m)
With six goals and two assists in his last four appearances, signing Carrasco really is a no-brainer. The Belgian flyer is Atlético's main man and his irresistible form has also brought him the decisive goal in each of the Rojiblancos' past two UEFA Champions League victories, including against this week's opposition last time out.
Barcelona (Graham Hunter, @BumperGraham)
Ivan Rakitić (MF, €7.4m)
Brilliant big-time temperament, fit and on form. Not a prolific goalscorer but tends to reserve his goals for big occasions. Also a point-scorer because his tackles, interceptions and assists are what helped give him the rare status as someone who won the back-to-back UEFA Europa League/UEFA Champions League double.
Basel (Ben Gladwell, @UEFAcomBenG)
Matías Delgado (MF, €5,9m)
Scored two at the weekend as Basel reinforced their lead at the top of the Swiss Super League, warming him up for a game in which Basel simply have to do more attacking if they are to keep their qualification hopes alive. That's a challenge the prolific midfielder will relish.
Bayern München (Jordan Maciel, @UEFAcomJordanM)
Arjen Robben (MF, €8.5m)
The Dutchman bagged two assists and a goal of his own in the Bundesliga on Saturday and will hoping to follow on from his brilliant matchday three performance when he returns to PSV for the first time since leaving in 2004.
Benfica (Paul Bryan, @UEFAcomPaulB)
Gonçalo Guedes (MF, €5.5m)
His confidence soaring following several standout performances of late for the Eagles, the 19-year-old opened his domestic goalscoring account in spectacular fashion in the 3-0 win against Paços de Ferreira at the weekend.
Beşiktaş (Çetin Cem Yılmaz, @UEFAcomCetinCY)
Vincent Aboubakar (FW, €6.5m)
Scored three and set up another in his last two starts, and will be again Beşiktaş's main option up front at home to Napoli. He was on the bench at the weekend, but will most definitely start in the UEFA Champions League and could easily repay his bargain price.
Celtic (Alex O'Henley, @UEFAcomAlexOH)
Tom Rogic (MF, €5.5m)
As he demonstrated against Aberdeen at the weekend, the Australian international can score goals as well as create them. Rogic has established himself as the principle playmaker in Brendan Rodgers' side, operating behind Moussa Dembélé. In a tight game his technique and sweet left foot can be decisive.
Club Brugge (Berend Scholten, @UEFAcomBerendS)
Anthony Limbombe (FW, €6.0m)
The 22-year-old winger's incisive running on the left led to Club Brugge's first goal in this UEFA Champions League campaign on matchday three and the following weekend Limbombe delivered both assists in the 2-1 classic victory over Anderlecht. Could set up goals or score himself.
CSKA Moskva (Richard van Poortvliet, @UEFAcomRichVP)
Igor Akinfeev (GK, €5.5M)
A man who has conceded in his last 40 UEFA Champions League matches might not be the obvious choice, but Akinfeev has been the one bright spot in what has been a difficult few weeks for CSKA. The Russian international has put in some inspired performances and even if he does not keep a clean sheet, he is certain to make a number of saves.
Dinamo Zagreb (Elvir Islamović, @UEFAcomElvirI)
Ante Ćorić (MF, €5.4m)
The 19-year-old is back in the Dinamo team and scored the winner against Inter Zaprešić last weekend. His talent, skill and energy make him the player most likely to give Sevilla problems.
Borussia Dortmund (Steffen Potter, @UEFAcomSteffenP)
Pierre-Emerick Aubameyang (FW, €10.0m)
Dortmund have been undergoing a difficult time in the past few weeks, but Aubameyang has been both a consistent performer and scorer, even when playing on the wings in the cup. It's no coincidence that he has picked up the most fantasy points of any Dortmund player.
Dynamo Kyiv (Bogdan Buga, @UEFAcomBogdanB)
Viktor Tsygankov (MF, €4.5m)
The 18-year old winger, in line to replace the injured Andriy Yarmolenko, has fantastic statistics in his last seven games for Dynamo – four goals and four assists.
Juventus (Paolo Menicucci, @UEFAcomPaoloM)
Leonardo Bonucci (DF, €6.0m)
The leader of a Juventus defence who are yet to concede after three games in Group H, the centre-back could also add assists with his precise long passes for the forwards and goals, as he proved with his powerful volley against Napoli at the weekend.
København (Nicklas Vinde, @UEFAcomNicklasV)
Federico Santander (FW, €6.0m)
No matter the price, Federico Santander is just the man to have in your team these days. Returned after a few weeks sidelined due to a broken cheekbone, he scored twice against Midtjylland this weekend having also found the net on matchday two. FCK score plenty of goals from set pieces, and he's strong in the air.
Legia Warszawa (Piotr Koźmiński, @UEFAComPiotrK)
Guilherme (MF, €5.4m)
A game-changer in Friday's 4-2 win against Korona Kielce, scoring one goal and setting up another to earn himself the man of the match award. One of Legia's most technical players, his good dribbling skills could cause Real Madrid some problems.
Leicester City (Simon Hart, @UEFAcomSimonH)
Ahmed Musa (FW, €6.4m)
Has featured only as a substitute so far in the UEFA Champions League but the pacy Nigerian now looks poised to make an impact having started – and scored – in his last two Premier League appearances, including the equaliser in Saturday's draw at Tottenham.
Bayer Leverkusen (Matthew Howarth, @UEFAcomMattH)
Admir Mehmedi (FW, €6.0m)
The 25-year-old scored his third goal of the campaign in Leverkusen's 2-1 victory at Wolfsburg on Saturday. Leverkusen's third top scorer behind Javier Hernández and Joel Pohjanpalo, Mehmedi will be looking to add to his one goal of the group stage so far at Wembley on Wednesday.
Ludogorets Razgrad (Stoyan Georgiev, @UEFAcomStoyanG)
Claudiu Keșerü (FW, €6.4m)
The Romanian has been brilliant in the domestic league so far this season, hitting nine goals in as many games. All but one of those strikes came in October, so he should start against Arsenal – whose centre-back Laurent Koscielny he knows very well from their spell at French side Tours.
Lyon (David Crossan, @UEFAcomDavidC)
Alexandre Lacazette (FW, €7.9m)
Lacazette broke through the 100-goal barrier in all competitions for Lyon with a matchwinning double at Toulouse on Saturday, showing the sharpness that suggests he's ready to put his penalty miss against Juventus behind him against the same opponents.
Manchester City (Simon Hart, @UEFAcomSimonH)
Sergio Agüero (FW, €10.1m)
Started on the bench at Barcelona a fortnight ago but responded in style on Saturday in the 4-0 win at West Bromwich Albion. Caught the eye with two goals, an assist and his overall work rate for the team. Got a hat-trick in City's first home game in the group and if they are to upset Barça, it's hard to imagine him not having an impact.
Monaco (David Crossan, @UEFAcomDavidC)
Thomas Lemar (MF, €6.0m)
Lemar provided a free-kick assist for Kamil Glik's goal at Saint-Etienne on Saturday and the quality of his left foot should again be in evidence against CSKA Moskva, just as in the first meeting between the sides.
Borussia Mönchengladbach (Matthew Howarth, @UEFAcomMattH)
André Hahn (FW, €6.0m)
Hahn was superb in the Foals' 2-0 win over Celtic a fortnight ago, scoring one and setting up the other. With Thorgan Hazard and Raffael yet to prove their fitness, the 26-year-old is set to start once more against the Scottish champions at Borussia-Park.
Napoli (Paolo Menicucci, @UEFAcomPaoloM)
José Callejón (FW, €7.5m)
The Spanish forward has already scored as many goals (seven) as the entire last season for Napoli in Serie A. His pace could be a decisive weapon for the Partenopei attack against Beşiktaş should the Turkish side leave spaces to counter.
Paris Saint-Germain (Chris Burke, @UEFAcomChrisB)
Ángel Di María (MF, €9.0m)
Edinson Cavani continues to be the main man for Paris, but playmaker Di María has shown signs of regaining form in recent weeks after a slow start to the season. On target against Basel on matchday three, he also set up Cavani – who else? – for the winner away to LOSC on Friday.
Porto (Paul Bryan, @UEFAcomPaulB)
André Silva (MF, €6.5m)
Drew a blank against Vitória de Setúbal at the weekend but the 20-year-old's record of having scored at least once in each of his previous five games for club and country means Saturday's setback may prove a mere blip.
PSV Eindhoven (Derek Brookman, @UEFAcomDerekB)
Gastón Pereiro (MF, €6.0m)
The nimble-footed Uruguayan scored both PSV's goals on Saturday as the Dutch champions overcame Vitesse. Pereiro has developed a habit of scoring in big matches - he also got two away to Ajax last season - and could definitely trouble the Bayern defence on Tuesday.
Real Madrid (Joe Walker, @UEFAcomJoeW)
Álvaro Morata (FW, €8.5m)
The young forward has been Madrid's super-sub in the competition thus far, scoring twice from the bench in the current UEFA Champions League campaign. He has five goals to his name in his last four games in all competitions and such a natural finisher is a snip at that price.
Rostov (Richard van Poortvliet, @UEFAcomRichVP)
César Navas (DF, €4.9M)
Rostov showed in their 1-0 defeat at home to Atlético that they are beginning to come to terms with the type of defensive solidity needed in the UEFA Champions League. Central to their new-found resilience has been defender César Navas. The towering Spaniard has a wealth of experience and his presence will be vital if Rostov can claim an unlikely result at the Estadio Vicente Calderón.
Sevilla (Graham Hunter, @BumperGraham)
Steven N'Zonzi (MF, €6.0m)
Rare that N'Zonzi scores, notwithstanding his outstanding winner against Atłético Madrid recently. But he's arguably in the form of his career. The game will move at his tempo, he'll be on the ball a lot, offensively and defensively and (whisper it) his price is outrageously low. Build your team round him.
Sporting (Paul Bryan, @UEFAcomPaulB)
Bruno César (MF, €5.5m)
With Sporting morale low, the dogged Brazilian may be worth a punt having previously displayed his fondness for the big occasion with goals against Real Madrid and Wednesday's opponents Borussia Dortmund.
Tottenham (Daniel Thacker, @UEFAcomDanielT)
Vincent Janssen (FW, €6.9m)
Although yet to find the net in the UEFA Champions League this term, the summer signing has scored twice from the penalty spot in his last two domestic games. Expected to get the nod up top in a must-win match for Spurs, this could be when Janssen finally breaks his duck from open play.