With Lindelof and Bailly turning 27 soon and Maguire 28, I can't imagine Ole will bring in a centre-back of similar age like Varane, Koulibaly, etc.
People may not agree, but I don't think Ole is as worried at centre back position as some have alluded to. I also think the goals we concede are very rarely to do with individual errors from our centre backs, but more so set pieces, losing the ball in dangerous areas, etc. This
article it explains it well.
Do I think we need a centre back? Yes, but I don't think we'll splash out on one. I think we could see a young, promising centre back, who will have the potential to take over when Maguire starts to hit the 30 bracket.
I say that because it seems like Ole is trying to emulate Sir Alex's transfer policy, regards age of players, which is something our previous managers were terrible at.
Gary Neville mentioned that
Sir Alex's policy "was like a very slow conveyor belt. A few would come in, and a few would leave. Never more than a handful each season, never a massive adaptation of the squad.
"It was controlled, with six or seven young players, 10 in the middle, and three or four that were in their 30s. Every club that has had a dynasty has had that stability of players."
For example, Ole replaced Ighalo (31) with Cavani (34) as we have quite a lot of young attacking players.
I'd say the same for our centre midfielders, too. With Fred, Matic, and Pogba 28 or above, this may explain why Ole signed Vdb (23) and why he went in for Bellingham (17) and Moises Caicedo (19), and will probably continue to target a young centre midfielder but I guess that's for another thread.
Going back to centre back, as I said, I think Ole may be targeting a centre back with a high ceiling - someone he can slowly develop. If rumours are to be believed, we were after Upamecano (22) and were in talks with Gabriel's (22) representatives last season. Based on that, I feel signings Botman, Tapsoba, Kounde, Carmo, White, Bastoni, Zagadou, etc would all make sense.
It would then mean in two or three years, this player could step in as our first choice, whilst purchasing another centre back at that time. Of course, this all depends on the progress Tuanzebe, Mengi, and others make, too.