Arsenal have it all to do following a disappointing outcome in the first leg of their Europa League semi-final tie against Atletico Madrid.The Gunners have to score in Madrid next Thursday if they are to have any chance of reaching the final following a 1-1 draw at the Emirates Stadium.With that scoreline, there’s still hope. But it was the manner in which Arsenal drew the match that left their fans frustrated.Atletico were forced to play with 10 men for 80 minutes after defender Sime Vrsaljko was sent off for two yellow card offences.Diego Simeone was sent to the stands shortly afterwards and Arsenal were in the driving seat.Alexandre Lacazette’s header appeared to pave the way for a convincing win but the Gunners were made to pay for their missed chances when Antoine Griezmann equalised in the 82nd minute.The Spanish side are now the favourites to advance, Arsenal’s task made all the more harder by Atleti’s incredible defensive record at home. Simeone’s side have conceded just four goals at home in La Liga all season.

Costa goes viral

Even worse for Arsenal is that Diego Costa will be ready to play. The Spain international travelled to London but wasn’t deemed fit enough to play, and so he watched on from the bench.

That still hasn’t prevented Costa from going viral on social media, though.

Play was briefly halted in first half injury-time, with the referee eager to prevent a confrontation, and Costa couldn’t help himself when he sensed a skirmish.

The 29-year-old was spotted rising out of his seat, with one Twitter user providing the perfect caption to accompany the short clip.

Brilliant. Costa just lives for highly-charged collisions!

The former Chelsea striker had some memorable clashes against Arsenal during his time in the Premier League - and Laurent Koscielny and Shkodran Mustafi won’t enjoy lining up against him should Simeone hand him a start next week.

“Both in England and in Spain, many teams have suffered at the hands of Diego Costa,” Simeone said before Thursday’s match.

The problem for Arsenal is that they will have to pay close attention to Costa and Griezmann next week - as well as finding a way past Atleti’s impervious defence.