Arsenal defender Per Mertesacker has no problem with squad rotation.

Mertesacker believes strength in depth has aided Arsenal's cause this season and sees squad rotation as a good thing.

"The manager told us before the start of the season that we have a lot of good centre-backs and is convinced we can make the team stronger and stronger because we have a lot of those good players in every position," he said.

"The manager said he would change sometimes and I think that's great for our development."