With the group stage done and dusted, our round of 16 reporters look back on their teams' campaigns, select the key players and pinpoint areas for improvement.
Berend Scholten, #BEL team reporter
Campaign in five: Difficult start, qualificiation mission accomplished.
Positives: Kevin De Bruyne, Eden Hazard and Romelu Lukaku finding some form.
Must improve: Determination, cutting edge.
Star performer: De Bruyne. He is the set-piece taker and has been involved in most of Belgium's attacks.
Best-case scenario: Who knows? Some big names – France, Germany, Italy – are in the other half of the draw.
Elvir Islamović, #CRO team reporter
Campaign in five: Impressive, exciting, emotional, passionate, promising.
Positives: Team spirit and industry allied to great skills and tactical perfection were the reasons for Croatia's success so far.
Must improve: Must try not to drop off mentally like they did against Czech Republic in the last 15 minutes.
Star performer: Ivan Perišić: hit the post in the first match, scored in second and third, with an assist against Spain as well. What's next?
Best-case scenario: If they continue to perform like this, semi-final or even the final is not impossible.
Simon Hart, #ENG team reporter
Campaign in five: Plentiful possession; no killer touch.
Positives: Eric Dier, Wayne Rooney and Kyle Walker. As a team, England have kept the ball well, averaging 57% possession per game – the fifth-best so far.
Must improve: Finishing. Only Portugal had more goal attempts than England's 65 in the group stage. The end-product? Three goals.
Star performer: Eric Dier
Best-case scenario: An early goal against Iceland, forcing the Nordic side to come out. This being England, it's best to stick by the old cliche and take one game at a time.
David Crossan, #FRA team reporter
Campaign in five: Leaving it late; Payet, Payet.
Positives: Topping the group, Payet, two clean sheets, mental resolve, Kanté, substitutes.
Must improve: Making class tell earlier against lower-ranked opposition, defending set pieces, giving the ball away less cheaply, balance to the side.
Star performer: Dimitri Payet
Best-case scenario: Glory on 10 July. Paul Pogba carries on where he left off against Switzerland, Antoine Griezmann grows into the tournament and Payet keeps doing what Payet does.
Steffen Potter, #GER team reporter
Campaign in five: Group won. More to come?
Positives: Yet to concede, improving form.
Must improve: Converting all those chances.
Star performer: Jérôme Boateng
Best-case scenario: Winners, of course. It's Germany.
Matthew Watson-Broughton, #HUN team reporter
Campaign in five: Inspiring, hard-fought, indefatigable, clinical, together.
Positives: Everything, most notably the realisation that even inexperienced teams like Hungary can succeed via teamwork and organisation.
Areas to improve: Lapses of concentration at the back which have cost them goals.
Star performer: So many to choose from. Zoltán Gera has rolled back the years and been consistently superb.
Best-case scenario: Obviously a EURO win. Realistically, another small miracle against Belgium – they'll want to run them close at least.
Jóhann Ólafur Sigurdsson, #ISL team reporter
Campaign in five: Fairy tale for the ages.
Positives: Unbeaten in first major finals and facing England in last 16!
Must improve: Need to be more at ease on the ball and relieve the pressure.
Star performer: Hannes Halldórsson
Best-case scenario: Sneak past England and fall at the quarter finals against the hosts, France.
Ben Gladwell, #ITA team reporter
Campaign in five: Strong start to build on.
Positives: The defence has proven to be as solid as expected. The camaraderie in the camp has also been excellent.
Must improve: Italy have rarely posed a sustained threat going forward; you get the feeling they will create and score more once they start attacking more. It's a tricky balance to strike.
Star performer: Leonardo Bonucci has been a pillar in defence. His understanding with goalkeeper and Juventus team-mate Gianluigi Buffon is one of this team's greatest strengths.
Best-case scenario: The manner of the Belgium victory raised expectations and you would not bet against them going all the way. Their route to the final looks perilous, though.
Graham Little, #NIR team reporter
Campaign in five: Delivering for world's best fans.
Positives: Defence, goalkeeper, tactical awareness, supporters.
Must improve: Need to offer more in attack.
Star performer: Michael McGovern
Best-case scenario: Beat Wales in a classic British knockout tie to set up a quarter-final date with Belgium.
Piotr Koźmiński, #POL team reporter
Campaign in five: Historic and first ever victory.
Positives: Impressive defence, no goals conceded – an expected weakness has proven a strength.
Areas to improve: Efficienty in front of goal. Poland, prolific in qualifying, need Robert Lewandowski to start firing.
Star performer: Grzegorz Krychowiak has proven as important as Lewandowski. A real leader in midfield.
Best case scenario: Becoming this tournament's Greece of 2004.
Joseph Walker, #POR team reporter
Campaign in five: Could have done much better.
Positives: Cristiano Ronaldo has found his scoring boots, Nani has looked lively, Renato Sanches looks to the manor born at final tournaments.
Must improve: Discipline. The defence has been leaky, the midfield overrun on occasion and the forwards profligate.
Star performer: Nani
Best-case scenario: Somehow find a way to beat Croatia. Do that and the route to the final looks appetising.
Paul Bryan, #IRL team reporter
Campaign in five: Lille heroics banish Bordeaux low.
Positives: Renewed team spirit and immense energy.
Must improve: Cutting edge in front of goal.
Star performer: Robbie Brady. The man of the moment.
Best-case scenario: This is it! Victory over Italy to set up a round of 16 meeting with hosts France.
Rastislav Hribik, #SVK team reporter
Campaign in five: Together we are strong.
Positives: Deadly counterattacks, amazing fighting spirit.
Must improve: Ball retention, supporting the forwards.
Star performer: Marek Hamšík
Best-case scenario: Repeat of sensational pre-finals win against Germany. Then it's Italy or Spain – Slovakia have beaten both in recent years. Truth is, it's a miracle already.
Graham Hunter, #ESP team reporter
Campaign in five: Promising and capable but inattentive.
Positives: Bordeaux crowd chanting Pique's name.
Must improve: Goalkeeping.
Star performer: Andrés Iniesta
Best-case scenario: Three in a row.
Matthew Howarth, #SUI team reporter
Campaign in five: Solid defensively; lacking in attack.
Positives: Fabian Schär and Johan Djourou have excelled at the heart of defence, Yann Sommer's sharp reflexes.
Areas to improve: Two goals in three matches does not bode well for the knockout stages.
Star performer: Granit Xhaka
Best-case scenario: Nobody is looking beyond Saturday's match with Poland, but having avoided the more difficult half of the draw, missing out on the quarter-finals would be a major disappointment.
Mark Pitman, #WAL team reporter
Campaign in five: The dream is very real.
Positives: Team spirit, tactical plans and playing without fear.
Must improve: Could be better in possession.
Star performer: Joe Allen
Best-case scenario: There is no limit to what this team can achieve. We're taking home the trophy.