And the Swiss will now miss the match with Liege and Man City as he goes through concussion protocols.
After nine games without a win, Arsenal got back to winning ways against West Ham.
And goalkeeper Bernd Leno feels Ljungberg’s commitment to creating a happier environment has been key.
“From the first day he said he wanted to see laughing faces, to see a good atmosphere,” Leno said. “We had a bad time, we are all human and it is not easy. It was not like we did not try, but it just did not work.
“I do not know what the club is deciding. We only have to focus on now. Freddie is doing a very good job. The team know about his quality and the way they want to play. We want to play with possession, keep the ball and also press very high, and also with transitions.