Arsenal were left to rue a number of missed chances after a 1-1 draw against Atletico Madrid in the first leg of their Europa League semi-final tie.
The opening 10 minutes were utterly frantic. Alexandre Lacazette had two opportunities to give Arsenal the lead but he was denied by the post and by Jan Oblak.
The Gunners were buoyed by their fast start and things got better when Sime Vrsaljko, already on a yellow card, was sent off for a foul on Lacazette.
Not many referees would be willing to show a player two yellow cards in the opening 10 minutes of a match - not least a Europa League semi-final - but it has be said that Clement Turpin made the right call on both occasions.
He then had another decision to make. Diego Simeone, incensed by a challenge from Hector Bellerin, delivered an animated response demanding the referee show the Arsenal right-back a yellow card.
Turpin felt that Simeone had crossed the line and duly sent him to the stands.
There, the Argentinian had to watch on as his side battled on, with Antoine Griezmann levelling the tie when he capitalised on some defensive lapses to score in the 82nd minute.
After missing those chances in the first half, Lacazette put Arsenal ahead with a header from Jack Wilshere’s cross in the 61st minute.
But Griezmann equalised and you can see in Simeone's reaction just how delighted he is.
Just what was he doing, trying to return to the dugout?!
Arsenal fans quickly reacted after seeing Simeone’s reaction.
Simeone was no doubt itching to have a message communicated to his players. He had been frustrated from the 10th minute, and the sight of Ivan Gazidis clapping Lacazette's goal just in front of him certainly won't have helped.
Simeone will be delighted with how the match ended. His side are now in the driving seat to reach the final.