Another winger to come in to add competition for Johnson, SWP isn't good enough anymore, Milner hasn't been great but he has the potential is still good for rotation.
A centre back might be necessary depending on Kolo's ban. Let's not forget Boateng also considers himself a centre back and there is Boyata, who I hope continues to develop next season. We also have Reece Wabara and Ben Mee, but whether they are Premiership quality I'm not sure.
Maybe a left back, but I'd want to give Kolarov another season because I was quite excited when we signed him, and he's come from a foreign league and has not been able to have long runs in the side due to injuries.
Also possibly another centre midfielder, not convinced about how much longer Barry will be in the team for, and also we need another attack minded central midfielder we can use alongside Yaya.
Hope we invest in some young talent though. Henderson, Phil Jones, Chamberlain, etc.