West Ham boss Slaven Bilic says there's no panic after Andre Ayew's thigh injury.
Bilic wrote for the London Evening Standard: "Andre Ayew's thigh injury is a big blow for us. We were delighted to have signed him from Swansea and the news that he is now out for a long time is not good.
"There will be no panic buying — maybe we are lacking one midfielder. Hopefully, we will qualify for the Europa League group stages but, even if we don't, we need one more in that position.
"But with the season hardly begun, we have had too many injuries, although the arrival of Jonathan Calleri will help.
"Diafra Sakho is still having treatment on an injury. He is our player and when he is fit and available, he is going to play."