Andy Carroll
Carroll scored three goals in eight minutes after West Ham fell two goals behind.Getty

West Ham United manager Slaven Bilic is unsure whether Andy Carroll will be fit for the FA Cup clash with Manchester United, adding Diafra Sakho is also unlikely to return to the squad.

Carroll, 27, was in sensational form against Arsenal on Saturday 9 April, scoring a hat-trick inside eight minutes to help his side come from two goals down in a 3-3 thriller at Upton Park.

The former Newcastle United striker, who has been plagued by injury since his arrival in east London, completed the match but speaking via West Ham's official website, Bilic could not say for certain whether he would lead the line again in the FA Cup quarter-final replay on Wednesday 12 April.

"I'm not blaming him but it's a fact that he's out every now and then," Bilic said. "And it's a fact that when he's got consistency he's like he was in this game.

"The medical team and the Club are doing everything they can with Andy and he is doing it, but he should be even better if he can stay away from those injuries for a few years, because it's a waste for West Ham, it's a waste for England, but it's the biggest waste for him.

He continued: "It's not the training, because when he trains, he loves football. He's not one of those who doesn't try in training. When we play five-a-side, he wants to win and he gives everything. Will he start against Man United? I hope he's going to be fit for Man United."

Bilic may turn to Emmanuel Emenike for Wednesday's clash against Louis van Gaal's side after suggesting Sakho will not feature. Prior to the Arsenal draw, Sakho had started West Ham's last two games but was left out of the squad on Saturday. Reports had suggested the Senegal striker had stormed out of training on Friday after learning he would not start against the Gunners, but those suggestions were later dismissed by Hammers co-chairman David Gold, who claimed his absence was due to illness.

In any case, Sakho is doub for the match against Louis van Gaal's side, along with on-loan midfielder Alex Song. "I don't think Sakho or Song will be fit for that game," Bilic said.