YOAN Zouma has been warned he must show more to earn the trust of manager Keith Hill.

The French defender has started the last six games for Wanderers but came under fire after his display in Tuesday night’s 3-1 victory against Manchester City.

Zouma has proved a hit with supporters since breaking into the team at the start of the season but in Hill’s opinion, still has a lot more to add to his game.

“Zouma at this moment in time does need his hand holding,” he told The Bolton News. “He has got to show more discipline if he is going to be a central defender, progress and build with Bolton Wanderers, he has to concentrate harder.

“He has got to show more discipline. Take no notice of the supporters. He should be oblivious of what the supporters are saying or singing about you, you have to concentrate on your opponent.

“He gets side-tracked and that isn’t sensible as a central defender. How do I put my trust in him?

“He has to be able to play alongside Adam Senior or Jordan Boon, for example, as one of the senior players when they are back fit. And at this moment in time it’s the senior players who are guiding Zouma and he’s 21… He should have learned and know the discipline of how to keep the door locked.

“He’s the custodian of our goalkeeper and the rest of the team so his relationship with the rest of the other players should be strong. Central defenders are the lock masters. He has to learn to show more discipline.”

Hill also turned his guns on Tuesday night’s referee, Peter Wright, claiming the standard of officiating in the Leasing.com Trophy had to improve.

“Chris O’Grady should have had a penalty,” he said. “In fact I think the referee was very lenient towards our opponents, and that’s not me being critical. It’s an official EFL game and it has to be treated with a little bit more respect.

“These teams want to take part in this competition so it has to be refereed or adjudicated correctly as it would be in the EFL, and it wasn’t.”