'Arsenal will need a sizeable lead to take to Madrid'

[BBC][Getty Images]We asked whether you agree with the Opta supercomputer, which gave Arsenal marginally more chance to win their Champions League quarter-final against Real Madrid.Here are some of your comments:Martin: Real Madrid are Real Madrid, especially in the Champions League. But they're leaky defensively and are likely to play a high line. Arsenal will need a sizeable lead to take to Madrid, and will need to defend solidly at the Bernabeu.Derek: With Arsenal anything could happen, but n