Arsenal play with 10-men in 0 - 0 draw at Wembley . Aaron is sent off and will miss second half . Barcelona held 1 - 1 by Athletic Bilbao . Bayer Leverkusen defeats FC Copenhagen 3 - 2 in Denmark .
Arsenal finish with 10-men in 0-0 draw at Besiktas . Aaron Ramsey sent off and will miss second leg . Napoli held 1-1 by Athletic Bilbao . Bayer Leverkusen defeats FC Copenhagen 3-2 in Denmark .