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 . Ramsey 's sending off , which came late on following a second yellow card , rules the midfielder out of next week 's second leg . Bayer Leverkusen defeats FC Copenhagen 3 - 2 in Denmark .
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 .