During Germany's World Cup qualifier with Azerbaijan, Mustafi pulled up with the problem and needed to be helped off the pitch, and it was immediately suggested by coach Joachim Low that the 25-year-old would miss a prolonged period.
"We've lost Mustafi for about four to six weeks".
Koscielny, on the other hand, skipped the recent global break to recover from an Achilles injury that has been a long-standing issue for the France defender. Secondly, Germany had already qualified so I didn't expect him to be out injured as the games would be less intense. "We have to cope with that now". He worked quite hard physically, he looks like he is capable of playing if he survives the test.
"Kolasinac is a minor problem, a hip problem.
At the moment, he's not available", commented Wenger. "But he trained on his own and the first signs are positive, so we made a decision to give him a test tomorrow", he added. I think about sorting out the problem, but overall I will decide completely tomorrow the line-up because Koscielny will have a test.
Watford have made an impressive start to the new league campaign, as they are now eighth in the standings, level on points with both Liverpool and Burnley, while they also won their last meeting with Arsenal, securing a 2-1 success at the Emirates Stadium in January. The centre-back will have a late fitness test this week to see whether he will be okay for the trip to Watford, which Wenger will be praying for some positive news on.