Chelsea teenager Nathaniel Chalobah has signed a new five-year contract at the club.
The 18-year-old midfielder spent last season on loan at Watford, where he impressed Chelsea legend and Hornets boss Gianfranco Zola.
Tipped as a future England international, the wiry, technically gifted midfielder is widely regarded to be one of the most promising academy products in England.
He featured on Chelsea's preseason tour to Asia, although he is yet to make his first-team competitive debut for the club.
Speaking to the official Chelsea website, Chalobah said: "It is great that Chelsea are willing to give me such a long contract, it is a big confidence boost.
"I think I have developed a lot as a player but I know I must continue to improve to earn a place in the Chelsea team and with my future settled, I can concentrate on doing that.
"Watford was a great experience, I learned about playing in front of a crowd every game and so many other lessons that there are too many to list. Training with Jose Mourinho and the Chelsea squad this preseason, every session has been different with something new to take on board. I've enjoyed it a lot.
"I would like to thank all the coaches who have helped me throughout my time at Chelsea."
His new Chelsea contract will keep him in west London until at least 2018. Chalobah has captained Chelsea youth and reserve teams, and is equally adept operating in midfield and at the back.
The youngster was named England Men's Youth Player of the Year earlier this year, after featuring for the under-19s and under-21s.
And Blues boss Jose Mourinho admitted he was delighted to have Chalobah committed to the club for the foreseeable future.
"He's a very, very good player and I like him very, very much. I am very impressed. For sure he is a Chelsea player."