Images from Wednesday's Champions League matches
Cheslea, AC Milan and Arsenal among the clubs in action
Napoli's Gonzalo Higuain is tackled by Arsenal's Tomas Rosicky during their Champions League soccer match at San Paolo stadium in Naples, December 11, 2013.MAX ROSSI/Reuters
Chelsea's Demba Ba, left, challenges Steaua Bucharest's Lukasz Szukala during their Champions League soccer match at Stamford Bridge in London December 11, 2013.STEFAN WERMUTH/Reuters
Marseille goalkeeper Steve Mandanda fails to catch the ball as Borussia Dortmund's Robert Lewandowski scores the first goal against Olympique Marseille during their Champions League soccer match at the Velodrome stadium in Marseille, December 11, 2013.PHILIPPE LAURENSON/Reuters
Napoli's Valon Behrami, left, challenges Arsenal's Mikel Arteta during their Champions League soccer match at San Paolo stadium in Naples, December 11, 2013.MAX ROSSI/Reuters
Barcelona's Gerard Pique celebrates after scoring a goal against Celtic during their Champions League soccer match at Camp Nou stadium in Barcelona December 11, 2013.ALBERT GEA/Reuters
Zenit St.Petersburg's Konstantin Zyryanov, right, fights for the ball with Austria Wien's Marko Stankovic during their Champions League soccer match at Ernst Happel stadium in Vienna December 11, 2013.DOMINIC EBENBICHLER/Reuters
FC Basel's Fabian Schaer, right, and Schalke 04 Kevin-Prince Boateng fight for the ball during their Champions League group E soccer match in Gelsenkirchen December 11, 2013.INA FASSBENDER/Reuters
Zenit St.Petersburg's Aleksandr Kerzhakov, left, fights for the ball with Austria Wien's James Holland during their Champions League soccer match at Ernst Happel stadium in Vienna December 11, 2013.DOMINIC EBENBICHLER/Reuters
Marco Streller of FC Basel, left, fights for the ball with Felipe Santana of Schalke 04 during their Champions League group E soccer match in Gelsenkirchen December 11, 2013.WOLFGANG RATTAY/Reuters
Galatasaray's Burak Yilmaz, right, and Andrea Barzagli of Juventus fight for the ball during their Champions League soccer match at the TT Arena Stadium in Istanbul, Turkey, Wednesday, Dec. 11, 2013.The Associated Press
Galatasaray's Wesley Sneijder (bottom) celebrates with his team mate Didier Drogba after scoring a goal against Juventus during their Champions League soccer match in Istanbul December 11, 2013.STRINGER/TURKEY/Reuters
Napoli's Goran Pandev, left, challenges Arsenal's Kieran Gibbs during their Champions League soccer match at San Paolo stadium in Naples, December 11, 2013.MAX ROSSI/Reuters
Schalke 04 Jefferson Farfan, centre, tries to score against FC Basel's Yann Sommer, left, during their Champions League group E soccer match in Gelsenkirchen December 11, 2013.INA FASSBENDER/Reuters
Chelsea's Demba Ba challenges Steaua Bucharest's goalkeeper Ciprian Tatarusanu during their Champions League soccer match at Stamford Bridge in London December 11, 2013.STEFAN WERMUTH/Reuters
Atletico Madrid's Diego Costa celebrates his goal during their Champions League soccer match against Porto at Vicente Calderon stadium in Madrid December 11, 2013.JUAN MEDINA/Reuters
AC Milan's Riccardo Montolivo reacts after receiving a red card during their Champions League soccer match against Ajax Amsterdam at the San Siro stadium in Milan December 11, 2013.ALESSANDRO GAROFALO/Reuters
AC Milan's Kaka, right, fights for the ball with Ajax Amsterdam's Christian Poulsen during their Champions League soccer match at the San Siro stadium in Milan December 11, 2013.ALESSANDRO GAROFALO/Reuters
Napoli's Jose Callejon controls the ball during the Champions League soccer match against Arsenal at San Paolo stadium in Naples, December 11, 2013.TONY GENTILE/Reuters
Schalke 04's Julian Draxler aska for substitution after he was injured during their Champions League group E soccer match against FC Basel in Gelsenkirchen December 11, 2013.WOLFGANG RATTAY/Reuters
Austria Vienna's Tomas Jun, left, scores a goal against Zenit St Petersburg during their Champions League soccer match in Vienna December 11, 2013.DOMINIC EBENBICHLER/Reuters
Austria Vienna's goalkeeper Heinz Lindner reacts after his team scored against Zenit St Petersburg during their Champions League soccer match in Vienna December 11, 2013.DOMINIC EBENBICHLER/Reuters
Napoli's Gonzalo Higuain celebrates after scoring against Arsenal during their Champions League soccer match at San Paolo stadium in Naples, December 11, 2013.TONY GENTILE/Reuters