"He will be weeks, there is no definite date for his return. He is evolving well. It's very unlucky what is happening with him. I think he will be back in a few weeks but we'll have to see how he is progressing, how his knee is feeling. It's too early to get an answer."
Arsenal forward Kai Havertz has had a knee operation which the club have described as 'minor.' The Germany international missed last week's 5-0 win against Leeds after picking up the problem during the win at Manchester United on the opening weekend of the Premier League season.
"His farewell makes me extremely sad because Thomas is someone I've known for a very long time - We played together in the national team for six years."