During Arsenal's 2-0 win over Brentford last week, centre-back Mosquera picked up an ankle injury, meaning he joins fellow defenders Gabriel Magalhaes and William Saliba on the sidelines.
After that game, Arteta said on the summer signing: "He’s going to be out for weeks. Unfortunately, it’s much more than what we expected, the way he was feeling. So, he’s going to be out for weeks."
He was absent for Arsenal's 2-1 defeat to Aston Villa at the weekend, with right-back Jurrien Timber partnering Piero Hincapie at the heart of the Gunners' defence. Now, according to Football London journalist Tom Canton, Mosquera's injury is worse than first hoped. As a result, Jesus will not be registered for the league phase of the Champions League but he could feature if they make it to the knockout rounds. Canton previously noted that a UEFA rule change allowed clubs to submit a temporary replacement of an outfield player who is ruled out for an extended period of time with a long-term injury or illness, but this is only applicable up until the sixth matchday, which was Arsenal's trip to Club Brugge on Wednesday. But it appears Arsenal have opted against registering Jesus for this upcoming fixture.
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