Gittens completing an international transfer means five per cent of the fee paid by Chelsea, or £2.4m, is distributed as a solidarity payment to those clubs with a hand in his development up to the age of 23. The catch here is Gittens is still only 20, so Dortmund also retain a majority of that sum.

Chelsea have signed Jamie Gittens from Borussia Dortmund on a contract until 2032, the Premier League club said on Saturday. "It feels great," Gittens said. "It's a great feeling to join such a big club as Chelsea. "I can't wait to learn from everyone in the team and to push myself to the max here. It's an amazing feeling."

Chelsea has completed the signing of English winger Jamie Gittens from Borussia Dortmund for a reported initial fee of 48.5 million pounds ($66 million)