Manchester City striker Sergio Aguero has denied claims he mocked a Villarreal player after his dramatic late winner on Tuesday night.[LNB] Manchester City striker Sergio Aguero has denied claims he mocked a Villarreal player after his dramatic late winner against the Spanish side last night.[LNB]Aguero struck in the third minute of injury time as City snatched a 2-1 win in their Champions League Group A encounter at the Etihad Stadium.[LNB]Villarreal vice-president Jose Manuel Llaneza and defender Carlos Marchena have been quoted in the Spanish media criticising Aguero's conduct, but the Argentinian denied any wrongdoing via his Twitter account.[LNB]Aguero, 23, wrote: "I have no interest in getting involved in controversies, but I have to deny having mocked a Villarreal player.[LNB]"Everyone can attest to my discipline and professionalism, I wouldn't do something like that."[LNB]Emotions ran high at the end of the game as several Villarreal players confronted the officials.[LNB]Coach Juan Carlos Garrido said his players at the time thought Aguero had been in an offside position.[LNB]Garrido conceded Aguero had been onside and the players "must accept" the decision but the goalscorer's actions still caused irritation for some.[LNB]Llaneza told Spanish media: "What he has done doesn't say much about the guy.[LNB]"It seems to me a lack of respect, ethics and team spirit. I thought he had learned better.[LNB]"I don't understand why he would mock fellow players for losing.[LNB]"I'm not saying it because of the result. We lost and we lost, and that's it.[LNB]"This is to do with what Aguero has done. He is a player who should give a lot of thanks to Spain.[LNB]"He's an important player who must be that at these times as well, without these actions."[LNB]Aguero, City's £38million club record summer signing, is well known to Spanish audiences after five years with Atletico Madrid.[LNB]Marchena, who scored an own goal to equalise for City, said: "In football you have to have class, especially in times like this.[LNB]"What Aguero did is not acceptable. These situations are a shame and are a mark of the man who does it."[LNB]Aguero had been making his return to action after a groin injury and appeared as a 62nd-minute substitute.[LNB]City fell behind to a Cani goal in the fourth minute but pulled level when Marchena diverted the ball into his own net late in the first half.