By Chris Harris

Chelsea fell victim to football's unpredictability this week, according to Arsène Wenger.

Arsenal's next opponents crashed out of the Champions League on Wednesday night after a stoppage-time strike from Andres Iniesta took Barcelona through to a Rome rendezvous with Manchester United. Chelsea's players - led by Didier Drogba - complained bitterly about referee Tom Henning Ovrebo at the end of the match after the Norwegian official turned down four penalty appeals.

Wenger watched the game unfold on television and, for the Frenchman, it was a reminder of the fine margin between glory and despair.

"I don’t feel I have to comment too much on [what happened after the game]," said Wenger. "A lot has been said and nobody will really find a solution the problems that occurred on the pitch.

"I believe overall that Chelsea had the opportunity to qualify and football, once again, has shown it is not always predictable.

"As for the referee, I do not want to go in to that. I have given my position about how the referee should have help but you have to accept the decision of the referee.

"We were knocked out in last year’s Champions League on a much more obvious penalty with Alexander Hleb but nobody made a circus of it. That’s why I do not want to comment on that."

Copyright 2014 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 8 May 2009