Diego Simeone: Atletico Madrid manager 'slaps official' during Champions League clash with Bayern Munich

The Argentine appeared uncontrollable on the Allianz Arena touchline

Diego Simeone on the touchline at the Allianz Arena (TWITTER/BT SPORT)

Diego Simeone forcefully slapped the arm of an official during last night's Champions League semi-final.

The Atletico Madrid manager was stalking and stomping along the touchline as he nervously watched his side secure a place in the European Cup final at the expense of Bayern Munich.

With his team trailing 2-1 on the night but heading through 2-2 on aggregate thanks to the away goals rule, Simeone appeared almost uncontrollable.

With the tie in injury-time, Simeone was unable to contain his frustration at an official holding the board to signal a substitution. The Argentine slapped the man's arm, much to his shock.

While at first it was assumed the man holding the board was a Uefa official, it transpired that it was actually a member of his own staff, Atletico Madrid delegate Pedro Pablo Matesanz.

Minutes later Simeone was celebrating when the full-time whistle went, having masterminded a path into the Champions League final for the second time in three years.

Atletico will play either Real Madrid or Manchester City, who meet tonight.