Holland is interested in adding a centre-half to his squad.

Crewe boss Steve Holland says he expects more new faces to arrive at the Alexandra Stadium to add to the four signings he has already made.

Goalkeeper Steve Collis and striker Calvin Zola joined the Alex on Monday to go along with other new recruits Joel Grant and Adam Legzdins.

"I haven't got a great deal to spend but I'm still not happy with the team," Holland told BBC Radio Stoke.

"I need to look where the squad needs improving and then go from there."

Zola was allowed to make the move to the Alex from Tranmere Rovers after he was granted a work permit last week.

"Calvin has been very excited about joining us for a long time but it also meant a lot to him to be allowed to stay in this country," said Holland.

"He's delighted, as are we, that permission has finally been given for him to play for us."