The Germany international will be a target for many clubs this summer, having already come onto Liverpool's radar in the past few years
By the time the transfer window closes this summer, thousands of signings will have been made. These will range from multi-million pound deals to free transfers. Some clubs will overpay as agents and sellers show off their negotiation skills, while others will pick up some impressive bargains.
Though the transfer window doesn’t officially open until July, some of this summer's business has already taken place. Bayern Munich, for example, have spent over €100 million (£87m/€113m) on a pair of defenders - Lucas Hernandez from Atletico Madrid and Benjamin Pavard from Stuttgart - while Juventus have stuck to their tried-and-trusted method of picking up out-of-contract players.