[BBC]Sunderland captain Granit Xhaka is set to stay at the club this summer, despite interest from Chelsea.The Switzerland midfielder, whose contract ends in 2028, was attracted by the prospect of reuniting with Chelsea manager Xabi Alonso, after playing under him at Bayer Leverkusen.Chelsea saw an £8m bid for Xhaka rejected by Sunderland last week and the Blues had been expected to return with an improved offer.However, sources at Sunderland have told BBC Sport that the 33-year-old is not