Former Arsenal defender Martin Keown has launched a furious attack on Mesut Ozil following the Gunners Europa League semifinal defeat to Atletico Madrid that ended Arsene Wenger hopes of ending his career with a trophy saying on the BT Sport broadcast that the Germany international "wasn't fit to wear the shirt." Diego Costa scored the only goal on the night and that defeat means Wenger will leave at the end of the season without silverware Keown, who won three league titles under manager Arsene Wenger, blasted Ozil performance in the second leg of the Europa League semifinal at the Wanda Metropolitano where Atletico Madrid were 1-0 winner courtesy of Diego Costa solo strike to seal a 2-1 aggregate win for Atletico Madrid. Keown, a BT Sport analyst, said Ozil did not put in a "proper performance" and he hasn't "been happy with [Ozil] for some time" and that it looked like Arsenal "had been carrying him." "Show some drive," Keown said. "Show some energy. He's on the edge of it. It's almost like his hand's in the air -- 'Look at this group. [They] aren't as good as me.' And somebody needed to grab him a long time ago, to give him a shake and say, 'We're trying to get the ball to you. We are working for you, but you're not working for us.' "I bet he doesn't play again this season. He'll have some emotional breakdown and won't be able to play at the weekend. I don't know how many illnesses he's had this season, but the fella is not kidding me. That is not a proper performance." The Gunners missed several glorious chances to equalise in Madrid but were denied through a combination of good defending and poor end product. Ozil, who was to be out of contract this summer, signed a three-year extension in February after plenty of speculation over his future. And Keown said that he hopes the manager who replaces Wenger will be able to get more out of Ozil than the midfielder has shown in recent games. "It's a big problem for the new manager because Wenger's invested an awful lot of money in this player and I'm not seeing a performance to go with it," Keown said. "He wasn't fit to wear the shirt for me tonight, and I've seen this a lot this season and it needs to be said because he needs to be dug out because we expect more from him. He's a World Cup winner. These are crocodile tears that I'm seeing from the player. He's not conning me." Keown then said that Wenger should "say a little bit more about some of these players that should have performed for him," but Wenger responded to Keown's comments by defending Ozil. "You will see that when you analyse his physical performance, that he gave a lot tonight," Wenger said. "It was a difficult game, physically very intense, and I am convinced that Ozil should not be now victimised by anyone because we did not score. "We had plenty of opportunities in the two games and we lose as a team. I don't agree with that coming out now straight away. When you want to be listened to now, you always have to be extreme. But football is more complicated and complex than that." Arsene Wenger side will end the season without a silverware and likely sixth the lowest position since he arrived 21 years ago.