Southampton midfielder Victor Wanyama suffered a hamstring injury in their FA Cup replay win over Ipswich Town.

An adductor strain saw France midfielder Schneiderlin miss the 1-0 win at Ipswich on Wednesday - a match which saw Wanyama pull up with a hamstring injury just before half-time.

"It is really negative because already we have some other injuries," Koeman said.

"I already spoke before the game with Victor and Steven Davis as I had made the decision to give both players 45 minutes.

"Then 12 seconds before half-time, he got his hamstring injury and, okay, you know if it is really a hamstring injury then he will be out for four or five weeks.

"I don't regret playing him. He had some calf problems out of the game against Man United, but he trained yesterday.

"But, okay, we know we have a tough programme and we don't have a big squad to resolve that kind of problem with injuries.

"Schneiderlin has a little bit the same as he had when he came back from the French national team.

"It is an adductor problem in his right leg and he will be out for three or four weeks, like Toby Alderweireld, but, okay, we have a lot of young players."