Leverkusen

UEFA milestones
• Leverkusen have conceded 199 goals in UEFA competition.

UEFA Champions League statistics
• Stefan Kiessling has committed 19 fouls, more than any other player still involved.

• Kiessling, Eren Derdiyok, Ömer Toprak, Michael Ballack and Michal Kadlec will incur a ban with their next yellow cards.

Latest domestic information
• Saturday 11 February: Borussia Dortmund 1-0 Bayer 04 Leverkusen (Kagawa 45)
Leno; Ćorluka (Bellarabi 75), Schwaab, Friedrich, Oczipka; Reinartz; Castro, Rolfes (Renato Augusto 61); L Bender; Kiessling, Schürrle

• Leverkusen, with Kadlec suspended, suffered a loss that leaves them with only one win in seven outings in all competitions.

• It was Leverkusen's second loss in 12 fixtures since their defeat at Valencia CF on 1 November, though six of those games ended in draws.

• Robin Dutt's side have kept only five clean sheets in their last 23 matches in all competitions.

• On 4 February, Vedran Ćorluka made his club debut as Leverkusen were held 2-2 by VfB Stuttgart, conceding an 89th-minute equaliser after Kadlec had been dismissed (63).

Injury news
• Sidney Sam will miss the Barcelona tie. He suffered a muscle injury during Leverkusen's training camp in Lagos, Portugal from 4-13 January. He returned as a substitute against Stuttgart but lasted 12 minutes before being withdrawn with a thigh problem.

• Ballack will also sit out the first leg having suffered a calf injury in training on Sunday.

• Renato Augusto replaced Sam, his first appearance since undergoing knee surgery in late October. He came on again on Saturday.

• Derdiyok has been out since 2 February, when he trod on a shard of glass while at home and required seven stitches in his foot.

• First-choice goalkeeper René Adler has been sidelined since undergoing knee surgery in mid-July.

• Tranquillo Barnetta has not played since 4 June because of a persistent right knee problem.

UEFA Champions League squad changes
In: Vedran Ćorluka (Tottenham Hotspur FC, loan)
Out: Nicolai Jørgensen (1. FC Kaiserslautern, loan), Hanno Balitsch (1. FC Nürnberg)

Miscellaneous
• Centre-back Philipp Wollscheid, 22, will join Leverkusen from Nürnberg this summer on a five-year deal.

Barcelona

UEFA milestones
• Barcelona have conceded 397 goals in UEFA competition.

UEFA Champions League statistics
• Barcelona scored 20 goals in the group stage, equalling a record set by Manchester United FC in 1998/99.

• Barça have had more shots wide (57) and won more corners (41) than any other team in the round of 16. They have committed the fewest fouls (61) along with Chelsea FC and collected only nine yellow cards, the joint lowest total among the teams remaining along with AC Milan.

• Lionel Messi has scored six goals, the joint highest total in the competition along with Mario Gomez.

• Messi has had more shots on goal (17) than any other player; his tally of 19 shots wide is more than anyone still involved.

• Carles Puyol's next booking will incur a suspension.

Latest domestic information
• Saturday 11 February: CA Osasuna 3-2 FC Barcelona (Lekić 4 22, Raúl García 56; Sánchez 51, Tello 73)
Valdés; Alves, Puyol (Cuenca 46), Piqué (Fàbregas 71), Abidal; Thiago Alcántara, Mascherano, Sergi; Sánchez, Messi, Pedro (Tello 45)

• Josep Guardiola's side's 18-match unbeaten run, 14 of them wins, ended against an Osasuna side they beat 8-0 in September. It was Barcelona's second loss in 47 outings following a 1-0 defeat at Getafe CF on 26 November.

• Saturday marked the first time in 70 games that Barcelona have conceded three goals in a game, since a 3-1 Copa del Rey defeat at Real Betis Balompié on 19 January 2011.

• Before Saturday, Puyol had gone 56 games without defeat for Barcelona, since the 3-1 2009/10 UEFA Champions League semi-final loss at FC Internazionale Milano.

• Guardiola's charges will meet Athletic Club in May's Copa del Rey final after aggregate victories over third-tier CE L'Hospitalet (including a 9-0 second-leg win), Osasuna, Real Madrid CF and Valencia CF.

• Barcelona are 47 games unbeaten at home, winning 40 since a 2-0 loss to Hércules CF on 11 September 2010.

• Barcelona went 1,112 minutes without conceding a goal at home, keeping a club record 12 clean sheets and scoring 55 without reply at the Camp Nou, before Rubén Castro struck for Betis on 15 January.

• Messi has scored 22 goals in his last 25 games for club and country.

• Barcelona went top of the Liga on goal difference by beating Real Madrid on 10 December but they have since slipped well adrift of the Merengues.

• The Catalan giants won the FIFA Club World Cup for the second time on 18 December, beating Brazil's Santos FC 4-0 in the final in Japan.

• It sealed Barcelona's third trophy this season. They beat FC Porto 2-0 in the UEFA Super Cup on 26 August having already wrapped up a 5-4 aggregate victory against Real Madrid in the Spanish Super Cup.

Injury news
• Pedro Rodríguez returned to action at Osasuna after four games out with strained adductors.

• Sergio Busquets has been out of action with a bruised knee since 4 February.

• Andrés Iniesta returned from a hamstring injury as a late substitute last Wednesday as Barça beat Valencia 2-0 to wrap up a 3-1 aggregate success in the Copa del Rey semi-finals.

• David Villa could miss the rest of the season after breaking his left leg in the Club World Cup semi-final defeat of Qatar's al-Sadd Sports Club on 15 December. Andreu Fontàs will not feature until 2012/13 after tearing knee ligaments on 12 January.

• Ibrahim Afellay remains sidelined after suffering a knee ligament injury in training in September.

UEFA Champions League squad changes
In: Tello
Out: Maxwell (Paris Saint-Germain FC)

• Aleksandr Hleb, who spent the first half of the season on loan at VfL Wolfsburg, has been released.

Miscellaneous
• Seydou Keita has been on Africa Cup of Nations duty, ever-present as Mali finished third after beating Ghana on Saturday.

• In January, Éric Abidal and José Pinto signed one-year contract extensions tying them to the club until June 2013. Isaac Cuenca has committed until summer 2015.

• Messi collected the FIFA Ballon d'Or for the third successive year on 9 January, beating Cristiano Ronaldo and Xavi Hernández in the poll. Guardiola was named men's coach of the year.

• Guardiola was also named coach of the UEFA.com users' Team of the Year, a side captained by Xavi and also containing Daniel Alves, Gerard Piqué, Iniesta and Messi.