Chelsea are continuing to pursue a deal for Jamie Gittens despite Borussia Dortmund holding out for a fee in the region of £40 million ($54.3m), sources have told ESPN.

On Monday, Chelsea confirmed the signing of 19-year-old defender Mamadou Sarr from sister club Strasbourg for a fee of £12m on a deal running until 2033.

Chelsea's offer of 35m euros (£29.5m) for English winger Jamie Gittens has been rejected by Borussia Dortmund, who are demanding 50-60m euros (£42-£50m) for the 20-year-old. (Sky Sports) Meanwhile, the Blues are prepared to pay AC Milan up to 15m euros (£12.6m) for 29-year-old France goalkeeper Mike Maignan. ( Sky Sports)