And, according to Arsene Wenger, he will have to build his fitness up again before being certain to play in our League Cup Final against Man City on Sunday. He frequently travels to Turkey when he has time off. "Mesut was sick, today was his first training session [back]", Wenger, the Arsenal manager, said.
"Firstly we have to qualify and then after that see who we get if we go through", Wenger said. "We are focused on doing well but ideally, we want to get back into the Champions League through the Premier League".
Ospina, 29, has played in all but one of Arsenal's League Cup matches this campaign and Cech, who has featured in all 27 of the club's Premier League games, expects his Colombian counterpart will continue in goal against City.
The two British sides face very differing levels of difficulty in defending their leads in the second legs of their round-of-32 Europa League ties, as Arsenal host Ostersunds and Celtic travel to Zenit St Petersburg. I highly doubt this will be an all-kids affair, though, like the early rounds were; if Arsenal want to really put this thing to bed, they'll still play the strongest possible lineup, I would hope.
The Wales global has been sidelined with a groin injury since early February, but he has now returned to training. "It depends how well he can improve his intensity of training until Sunday".
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The captains of all six teams expressed their wish to lay their hands on the glittering trophy on March 25 in Karachi . Meanwhile, newbies Sultans will be led by Pakistan all-rounder Shoaib Malik.
"When you are a player, inside, playing against Celtic, it is a great atmosphere".
'Maybe sometimes, teams can lose two, three times in a row and we win our games so anything is possible. He (Ospina) played in the whole competition.
"A big part is done but to be professional is to finish the job", Wenger said. It would be absolutely stupid of us to think we can go out there and have a stroll. "It's a good opportunity for the players to show they have the quality to compete at this level".
City put out a strong side against Wigan with numerous same players likely to start on Sunday, although they will probably need to play a centre back at left back on Sunday to cover for Delphs suspension, with Benjamin Mendy still out injured.