No sign of key Arsenal defender in training amid fears he'll miss crunch Atletico Madrid Champions League clash

Arsenal face a significant defensive setback as Jurrien Timber missed the final training session ahead of Wednesday's Champions League semi-final first leg encounter against Atletico Madrid. With Kai Havertz also set to be absent following a knock against Newcastle, Mikel Arteta must navigate a growing injury list for the clash at the Wanda Metropolitano. However, the Gunners have been handed a boost with the return of three key stars.