Atletico Madrid coach Diego Simeone concedes that his behaviour needs to improve following his dismissal in the first leg of his side's Europa League semi-final with Arsenal.
Simeone was sent to the stands in the early stages of an eventful game at Emirates Stadium on Thursday, having complained to officials following the red card shown to right-back Sime Vrsaljko in the 10th minute.
UEFA has charged the former Argentina international with insulting a match official and improper conduct, with a disciplinary panel to judge the case on May 4, the day after the second leg in Madrid.