European champions Barcelona defeat Sparta Prague 1 - 0 in Czech Republic thanks to Oscar . Gokdeniz Karadeniz put the away side in front before Roman Sharonov was sent off just before half time , yet Rubin added a second in stoppage time through Pablo Orbaiz . Napoli , second in Serie A , suffer a shock 1 - 0 home defeat by Czech side Viktoria Plzen . Champions League holders Atletico Madrid suffer a 1 - 0 away defeat to Russian side Rubin Kazan . Zenit St Petersburg defeat Liverpool 2 - 0 in first leg of their Europa League last 32 clash .
European champions Barcelona defeat Sparta Prague 1 - 0 in Czech Republic thanks to Oscar . Napoli , second in Serie A , suffer a shock 1 - 0 home defeat by Czech side Viktoria Plzen . Champions League holders Atletico Madrid suffer a 1 - 0 away defeat to Russian side Rubin Kazan . Zenit St Petersburg defeat Liverpool 2 - 0 in first leg of their Europa League last 32 clash .