The 22-year-old central defender — who is Bournemouth’s third signing of the close season following those of Bosnian international goalkeeper Asmir Begovic and veteran England striker Jermain Defoe — shone for the «Cherries» when on loan from Chelsea last season.

Ake, who notably scored the winner for Bournemouth in a remarkable come from behind 4-3 win over Liverpool before returning to Chelsea in January, said he could progress more as a player at his new club as playing opportunities at the champions were scarce.

«I had a great time here last season so I’m really happy to be back,» Ake told the club website.

«It’s an exciting challenge. Chelsea is a great club and I learned so much there but this is a new step and the right place for me to develop even more.

«The fans haven’t seen the best of me yet. I always set the bar high so I know there is a lot of things I still have to work on.

«With the help of the manager here I know I can keep improving and become a better player.»