Ola Aina has signed a new contract at Stamford Bridge until 2021 and will spend the 2018/19 season on loan at Italian side Torino.
Aina, a versatile defender, made his first-team debut for the Blues in a League Cup win over Bristol Rovers in 2016 having progressed through our Academy.
Among his trophies won with our younger sides are two UEFA Youth Leagues and two FA Youth Cups.
Aina spent last season on loan with Hull City in the Championship where he featured regularly for the Tigers.
He will now continue his development in the Italian top flight.