Arsene Wenger has said that he is concerned about Theo Walcott's persistent injury problems. Walcott, 21, faces up to six weeks out after damaging his ankle in England's 3-1 Euro 2012 qualifying win over Switzerland on Tuesday.
Wenger said: "It is frustrating for him. You never know what kind of psychological impact it has. The mental side is always a question mark when a player gets injuries."
