Bayer Leverkusen striker Patrik Schick says his team is not capable of fighting for the German Bundesliga title without new signings after Granit Xhaka joined a string of title-winning players to leave the club.

Sunderland have completed the signing of Granit Xhaka from Bayer Leverkusen. The Athletic reported on Monday that Sunderland had agreed a fee worth up to €20million (£13.4m; $23.3m) with Leverkusen, who had previously been told by the midfielder that he only wants to join the Premier League club.