He told ChronicleLive: "I am not saying there will be (a major overhaul), there are just so many unknowns in the transfer market this summer. For all the Premier League teams it could be a window like no other because of January when there was minimal activity.
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"What has that done to the value of players? That is what is slightly unsure.
"I don't anticipate there being a massive overhaul. Certainly, I don't think we want one because I think we have a really good squad.
"We want to pick some really good players to add to the group. But we don't know yet."