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Stoke have signed Victor Moses, 23, on a season-long loan from Chelsea.
Moses has struggled to make an impact at Stamford Bridge since moving from Wigan in 2012 and spent last season on loan at Liverpool.
He is Mark Hughes' sixth signing of the summer, but will not be available for the opening-day clash with Aston Villa at the Britannia Stadium.
City chief executive Tony Scholes said: "We are delighted to have secured the services of such an exciting young talent in Victor."
Stoke City have completed the season-long loan of Victor Moses from Chelsea #scfc
Mourinho refuses to confirm if Cech or Courtois will start. "They will know. I think Chelsea have two of three best goalkeepers in world."