Abdul Rahman Baba
Chelsea agreed a deal with Augsburg for Abdul Rahman BabaGetty

Chelsea have confirmed they have reached an agreement with FC Augsburg for the transfer of Abdul Baba Rahman.

The 21-year-old joined Augsburg last summer and in his debut season, he helped them qualify for the Europa League. A versatile player, who is mainly a left-back, he can also operate as a midfielder and a winger.

A statement on Chelsea's official website read: "Chelsea Football Club is delighted to announce we have reached an agreement with FC Augsburg for the transfer of Abdul Baba Rahman."

Chelsea allowed Filipe Luis to return to Atletcio Madrid a year after he joined the Premier League champions. The Brazil international's exit has left Jose Mourinho with Cesar Azpilicueta as the only first choice left-back in the squad.

The arrival of Rahman will give the Portuguese tactician more options in the left-back position during the team selection. The Ghanaian international expressed his delight after sealing a move to Stamford Bridge and is looking forward to working under the Chelsea manager.

"I am very happy to sign for Chelsea, one of the biggest clubs in the world, and I can't wait to train with my new team-mates and very much looking forward to working with them and Mr Mourinho," Rahman said.

"I am also looking forward to having the opportunity to meet the fans as soon as possible."

Rahman was part of the Ghana squad which finished runners–up to Ivory Coast in the African Cup of Nations earlier this year. According to Sky Sports, the transfer fee is to be in excess of £20m ($31.3m).

Chelsea have already signed Danilo Pantic, Nathan, Asmir Begovic and Radamel Falcao, with the latter joining the west London club on loan from AS Monaco. Rahman becomes the Blues' fifth signing of the summer transfer window.