Not sold on Timber tbh. I've watched him quite alot now, and aside from his lack of aerial ability I'm also not at all impressed with him defensively. He's good at bringing the ball forward and perfectly suited to a possession style but even this can often lead to him being stranded up the pitch if the opposition manage to counter attack into the space he has vacated. Maguire, Varane and Lindelof are all very good in possession and progressing the ball imo. Their problems have been defensive positioning and poor one on one defending (Maguire in particular). I've seen Timber beaten in a lot of 1v1 scenarios. Considering the massive increase in quality opposition he would face in the Pl, I would be quite concerned. If there is one positive, I guess it's that he's only 20. Personally I'd steer clear and look elsewhere.