For all his domestic achievements, Wenger will also depart without a European trophy to his name and it remains to be seen how sitting outside the continent's premier tournament will affect Arsenal's pursuit of a new coach, and players, this summer. "I'm very sad tonight," Wenger said. "Unfortunately you have to go through that - the game can be very cruel, sometimes very nice, but the suffering is very strong tonight." More immediately, there was the concerning sight of Laurent Koscielny being carried off on a stretcher in the 12th minute after the defender went down, with nobody near him, clutching his left Achilles. "It doesn't look very good, it's his Achilles," Wenger said. "You can always hope for a miracle in the scan but if he has a ruptured Achilles, his chances for the World Cup are non-existent."Atlético Madrid have reached the Europa League final!
— ESPN FC (@ESPNFC) May 3, 2018
They knock Arsenal out and spoil a potential dream farewell for Arsene Wenger. pic.twitter.com/Hc4pfnFNo8
Koscielny's exit made a tough task all the more difficult for Arsenal, who were always going to be up against it at the Wanda Metropolitano, where Atletico have not lost in the league all season and not conceded a goal since January. It was perhaps also telling that Costa's physicality and Atletico's defensive rigour ultimately proved decisive, two qualities Wenger's Arsenal in recent years have so lacked. "Costa came back here for nights like this," Atletico coach Diego Simeone said. "To be important, to lead from the front. This side needs an aggressive striker and that's exactly what he is." Costa was hunting Arsenal's back four from the outset as he wrestled past Koscielny, knocked over Nacho Monreal before firing wide with only David Ospina to beat.WATCH: “That performance sums up Arsenal.”
— Sky Sports PL (@SkySportsPL) May 3, 2018
Arsenal's defensive frailties cost them against Atletico Madrid, according to Steve Sidwell and Matthew Upson!
Join #TheDebate live on Sky Sports Premier League now! pic.twitter.com/iaT2yTx9Z2
Koscielny was substituted soon after, replaced by Calum Chambers, but Arsenal enjoyed one of their best spells midway through the half, dominating possession and reducing Atletico to a series of rushed clearances. At the back, however, they were shaky, as Ospina had balls booted out of his grasp by his teammates on more than one occasion while their passing out of the back was too often careless. By the end of the half, Atletico had regained the ascendancy and in injury-time, they struck. Granit Xhaka's weak header put Arsenal on the back foot and Antoine Griezmann threaded through to Costa.? Arsene Wenger's final European match in charge of Arsenal ends in defeat to Atletico Madrid and they are OUT of the Europa League! ?
— Sky Sports Football (@SkyFootball) May 3, 2018
Diego Costa's goal fires Atletico Madrid to the final as they win 2-1 on aggregate.
Recap: https://t.co/tRMwYHu80m pic.twitter.com/YAOFn2Mfqj
He held off Hector Bellerin with ease before coolly finishing past Ospina. Arsenal came again after the interval. Aaron Ramsey bundled his way through but the ball would not fall for him six yards out while Mesut Ozil flashed too sumptuous deliveries across the face of goal. Griezmann could have put the tie to bed after Costa had turned Shkodran Mustafi inside out but the defender recovered just in time to block. A vintage Costa performance would not be complete without a scuffle and he provided it when Mustafi tried too enthusiastically to grab the ball off him for a free-kick. Both players were booked and when Costa was substituted soon after, the striker was given a standing ovation. Arsenal piled forward late on in search of an equaliser but in truth, their night ended without them really creating a clear-cut chance. When the final whistle blew, Wenger marched straight down the tunnel as around him, Atletico's celebrations began.Diego Costa has scored 4 goals in 7 career appearances against Arsenal.
— Sky Sports Statto (@SkySportsStatto) May 3, 2018
Atletico Madrid have lost 2 of 57 games in which Diego Costa has scored (W53 D2) #UEL #ATLvAFC pic.twitter.com/KOvspoIc27
⏰ RESULTS ⏰
— UEFA Europa League (@EuropaLeague) May 3, 2018
Diego Costa's first-half strike sends Atlético into the final! ???
Super-sub Rolando nets in extra time to put Marseille through! ???#UEL pic.twitter.com/ICCjExxG1K