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."
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