Chelsea have signed French youngster Lassana Diarra from French second division side Le Havre.
Lassana Diarra is a French Under-21 international
Diarra is a French Under-21 international and during the summer won five caps while helping France win the Toulon Tournament.
The Paris-born 20-year-old has signed for the Premiership champions on undisclosed terms.
Diarra had been training with Chelsea and will join Jose Mourinho's squad on their US tour next week.