• 'Spurs look strong at home. It is a real 50-50 tie' • Wenger still laments Arsenal exit to Barcelona

Arsène Wenger believes that his Tottenham Hotspur rival Harry Redknapp has every chance of upsetting Real Madrid and advancing into the Champions League semi-finals.

The Arsenal manager, who is no friend of Madrid's José Mourinho, continues to lament his team's European exit at the hands of Barcelona in the last 16, a tie that he feels was shaped by Robin van Persie's controversial sending-off in the second leg.

Wenger will be no more than an interested onlooker this week, when Tottenham travel to the Santiago Bernabéu for the first leg of the quarter-final.

"It is very open," Wenger said. "Who cannot be beaten? If everything went all right, Barcelona would be out today ... if it had stayed 11 v 11, I am convinced of that. So why can't Spurs beat Madrid? Madrid has a disadvantage to play the first game at home and Spurs look to be strong at home. It is a real 50-50 tie."