The striker has been asked to lead the line for West Ham during injury trouble.
The Croatian is quoted by BT Sport as stating:
"Andy is trying hard in training, and has played well in the few games that he has played for us.
"So far he has showed his class more as an impact player, to come on in the last 20 mins or half an hour and lift our game.
"But also he has to show it when he plays from the start. We hope he is going to do that now for us."
West Ham certainly have some striker issues at the moment. Diafra Sakho is out of action for a number of weeks and Enner Valencia continues his recovery from a bothersome ankle complaint that seems unshakeable.
Carroll himself has battled with injury problems and since his return from a knee injury he has struggled to play for a full 90 minutes. This season he has managed to play 90 minutes just once in a game against Watford that he would very much like to forget.
This weekend West Ham take on Manchester United - who boast one of the toughest defences in the league at the moment and Carroll will have a hard time breaking them down.
He was heavily involved in West Ham's training session today as he looks set to get the role of leading man in the West Ham team for the festive period.