Chelsea have included a buy-back clause as part of the deal which saw Nathaniel Chalobah join Watford for £5.5million.

Standard Sport understands that the Blues also stand to profit should the Hornets sell Chalobah elsewhere as they have negotiated a sell-on fee.

Chelsea wanted to hand the 22-year-old a new contract but as first revealed last month, the midfielder was looking to leave after making just 15 appearances last term.

Chalobah, who is the most capped played at England youth level, had only one-year left on his current contract and Watford are believe to be thrilled at getting such a bargain.

Speaking about Antonio Conte while on international duty earlier this summer, Chalobah said: "He showed faith in me in pre-season and he liked the way I was working. That was a confidence boost.

"As a player, you just get the vibe.

"It's a very high standard at the club and the club has an amazing academy and produces really top players.

The players on Chelsea’s transfer shortlist 16 show all The players on Chelsea’s transfer shortlist 1/16 The players on Chelsea's wishlist... Lindsey Parnaby/AFP/Getty Images 2/16 Alexis Sanchez | Arsenal Arsenal FC via Getty Images 3/16 Alex Sandro | Juventus Getty Images 4/16 Alex Oxlade-Chamberlain | Arsenal Stuart MacFarlane/Arsenal FC via Getty Images 5/16 Ross Barkley | Everton Getty Images 6/16 Djibril Sidibe | AS Monaco AFP/Getty Images 7/16 Virgil van Dijk | Southampton Getty Images 8/16 Adama Traore | Middlesbrough 9/16 Cedric Soares | Southampton Getty Images 10/16 Ryan Bertrand | Southampton Ian Walton/Getty Images 11/16 Mousa Dembele | Celtic Getty Images 12/16 Fernando Llorente | Swansea Getty Images 13/16 Marco Verratti | PSG AFP/Getty Images 14/16 Faouzi Ghoulam | Napoli Francesco Pecoraro/Getty Images 15/16 Danny Drinkwater | Leicester City Getty Images 16/16 Renato Sanches | Bayern Munich Bongarts/Getty Images 1/16 The players on Chelsea's wishlist... Lindsey Parnaby/AFP/Getty Images 2/16 Alexis Sanchez | Arsenal Arsenal FC via Getty Images 3/16 Alex Sandro | Juventus Getty Images 4/16 Alex Oxlade-Chamberlain | Arsenal Stuart MacFarlane/Arsenal FC via Getty Images 5/16 Ross Barkley | Everton Getty Images 6/16 Djibril Sidibe | AS Monaco AFP/Getty Images 7/16 Virgil van Dijk | Southampton Getty Images 8/16 Adama Traore | Middlesbrough 9/16 Cedric Soares | Southampton Getty Images 10/16 Ryan Bertrand | Southampton Ian Walton/Getty Images 11/16 Mousa Dembele | Celtic Getty Images 12/16 Fernando Llorente | Swansea Getty Images 13/16 Marco Verratti | PSG AFP/Getty Images 14/16 Faouzi Ghoulam | Napoli Francesco Pecoraro/Getty Images 15/16 Danny Drinkwater | Leicester City Getty Images 16/16 Renato Sanches | Bayern Munich Bongarts/Getty Images

"It's just there's that barrier getting in there and staying in there. You're playing for one of the best teams in Europe, they're in the Champions League and the demand is high on winning."