Atletico Madrid coach Diego Simeone admits they must be wary of Mesut Ozil tonight.

Atletico meet Arsenal tonight in the first-leg of their Europa League semifinal.

Simeone said his side must shut the German down in a bid to take a lead back to Spain.

"Ozil has incredible vision," he said. "He manages the speed of transitions at Arsenal - if he wants his team to play quickly he will.

"It's up to us to make it the kind of game we want to have - and be brave."