Lionel Messi scores as Barça came from behind to thrash Panathinaikos in their opening Group D match Photograph: Jasper Juinen/Getty Images
Gerard Piqué vies with Sergei Kornilenko of Rubin Kazan as Barcelona secured a draw in Russia Photograph: Alexander Nemenov/AFP/Getty Images
Barcelona captain Carles Puyol competes with Copenhagen's César Santin Photograph: Lluis Gene/AFP/Getty Images
Copenhagen celebrate Claudemir's equaliser, one minute after Messi had put the visitors in front Photograph: Javier Soriano/AFP/Getty Images
Messi is surrounded by Panathinaikos's Jean-Alain Boumsong and Nikos Spiropoulos. The Argentine still managed to scored in a comfortable win Photograph: Aris Messinis/AFP/Getty Images
Messi again runs the opposition ragged Photograph: Lluis Gene/AFP/Getty Images
David Villa puts Barcelona 1-0 up at the Emirates as the Catalan club get off to a strong start in their last-16 first leg Photograph: Jasper Juinen/Getty Images
Piqué challenges Arsenal forward Robin van Persie, as the hosts come back into the match. Van Persie scores the equaliser with 12 minutes remaining ... Photograph: Lluis Gene/AFP/Getty Images
Before Andrey Arshavin nets an 83rd-minute winner Photograph: Lluis Gene/AFP/Getty Images
Manuel Almunia, on as a substitute, is helpless to prevent Messi from levelling the scores on aggregate just before half-time Photograph: Carl Recine/Action Images
An own goal by Sergio Busquets makes it 1-1 on the night but Xavi's slick strike and a Messi penalty sent Barça through after Van Persie was dismissed Photograph: Carl De Souza/AFP/Getty Images
Xavi and Piqué celebrate the latter's goal in a crushing win at Camp Nou Photograph: David Ramos/Getty Images
A familiar sight: Messi evading his markers, this time Shakhtar Donetsk's Tomas Hubschman and Mykola Ishchenko Photograph: Laurence Griffiths/Getty Images
The first leg of the semi-final clásico between the two great Spanish rivals is a hot-tempered affair. Here, Barcelona's substitute goalkeeper Jose Pinto clashes with a Real Madrid official as the players leave the pitch at half time, with Pinto receiving a red card for his troubles Photograph: Alex Livesey/Getty Images
A fractious match descends further as Real Madrid's Pepe is dismissed for a challenge on Dani Alves Photograph: Manu Fernandez/AP
Messi beats Sergio Ramos to the ball to open the scoring Photograph: Alex Livesey/Getty Images
Madrid manager José Mourinho gives a thumbs up to the assistant referee as he too is sent to the stands Photograph: Alex Livesey/Getty Images
Messi celebrates after scoring his second goal – a real classic Photograph: LLUIS GENE/AFP
The Barcelona players toss French defender Eric Abidal – recently recovered from an operation on a liver tumour – in the air after securing their passage to the final Photograph: JOSEP LAGO/AFP
