A photographic look at Tuesday's Champions League Group Stage
Police stand guard around the Olympic stadium before a Champions League Group A soccer match between Dynamo Kiev and Porto in Kiev November 6, 2012.GLEB GARANICH/Reuters
Manchester City's Mario Balotelli (3rd L) is challenged by Ajax Amsterdam's Ricardo Van Rhijn during their Champions League Group D soccer match at The Etihad Stadium in Manchester, northern England, November 6, 2012.DARREN STAPLES/Reuters
Manchester City's Mario Balotelli (L) speaks to referee Peter Rasmussen (R) after being held by Ajax of Amsterdam Ricardo`s Van Rhijn duringtheir Champions League Group D soccer match against at the Etihad Stadium in Manchester, northern England November 6, 2012. The game ended in a 2-2 draw.DARREN STAPLES/Reuters
Security guards detain a supporter, who ran onto the pitch, during the Champions League Group A soccer match between Dynamo Kiev and Porto at the Olympic stadium in Kiev November 6, 2012. The game ended in a scoreless tie.GLEB GARANICH/Reuters
Zenit St. Petersburg's supporters light flares during their Champions League Group C soccer match against Anderlecht at the Constant Vanden Stock stadium in Brussels November 6, 2012.LAURENT DUBRULE/Reuters
Montpellier's Younes Belhanda scores with a penalty against Olympiakos during their Champions League Group B soccer match at the Karaiskaki stadium in Piraeus near Athens November 6, 2012. Olympiakos won 3-1.YORGOS KARAHALIS/Reuters
Zenit St. Petersburg's Danny shots past Anderlecht's goalkeeper Silvio Proto (R) during their Champions League Group C soccer match at the Constant Vanden Stock stadium in Brussels November 6, 2012. Danny did not score while Anderlecht won 1-0FRANCOIS LENOIR/Reuters
Anderlecht's Dieudonne Mbokani celebrates with Massimo Bruno (L) after scoring against Zenit St. Petersburg during their Champions League Group C soccer match at the Constant Vanden Stock stadium in Brussels November 6, 2012.FRANCOIS LENOIR/Reuters
Schalke 04's Jefferson Farfan tackles Arsenal's Jack Wilshere (L) during their Champions League Group B soccer match in Gelsenkirchen November 6, 2012. The teams tied 2-2.INA FASSBENDER/Reuters
Schalke 04's Christian Fuchs tackles Arsenal's Olivier Giroud (R) during their Champions League Group B soccer match in Gelsenkirchen November 6, 2012.INA FASSBENDER/Reuters
Real Madrid's Sergio Ramos (L) and team-mate Pepe react after colliding during their Champions League Group D soccer match against Borussia Dortmund at Santiago Bernabeu stadium in Madrid, November 6, 2012. The teams tied 2-2.JUAN MEDINA/Reuters
Real Madrid's Cristiano Ronaldo (R) takes a shot on goal as Borussia Dortmund's Mats Hummels (L) and Neven Subotic block during their Champions League Group D soccer match at Santiago Bernabeu stadium in Madrid, November 6, 2012.JUAN MEDINA/Reuters
Olympiakos' Dimitris Siovas (front L) challenges Montpellier's Souleymane Camara (front R) during their Champions League Group B soccer match at the Karaiskaki stadium in Piraeus near Athens November 6, 2012.YORGOS KARAHALIS/Reuters
Montpellier's Younes Belhanda scores a penalty against Olympiakos during a group B Champions League soccer match at Karaiskaki stadium in Piraeus, near Athens, Tuesday, Nov. 6, 2012. Olympiakos won 3-1.Thanassis Stavrakis/The Associated Press
Paris St Germain's Zlatan Ibrahimovic controls the ball during his team's Champions League soccer match against Dinamo Zagreb at Parc des Princes stadium in Paris, November 6, 2012.STRINGER/Reuters
AC Milan's Robinho (L) fights for the ball with Malaga's Isco (hidden) and Welington during their Champions League Group C soccer match at San Siro stadium in Milan November 6, 2012. The game ended in a 1-1 tie.ALESSANDRO GAROFALO/Reuters
Malaga's Eliseu celebrates after scoring against AC Milan during their Champions League Group C soccer match at San Siro stadium in Milan November 6, 2012.ALESSANDRO GAROFALO/Reuters