Former West Ham United captain Alvin Martin is happy to see Andy Carroll back in action.
The Geordie has helped West Ham climb the table in recent weeks.
Martin told whufc.com: "I think he's one of them I wouldn't like to play against. There were lots about when I was playing, there was always one big centre-forward in every team. But I think, when he's on form, you could say that he comes into the category of unplayable.
"If you get the right service to him, the diagonal ball, put the right flight on it, then he's going to be coming over the top of you as a centre-half and really you've just got to make it as difficult as possible for him. But the other players then will play off him, especially people like Kevin Nolan. When Andy Carroll's playing well and he's winning 70 or 80 per cent of his headers, he [Nolan] knows instinctively where it's going to drop and it's very hard to play against."
