Tomas Kalas has signed a new four-year deal with Chelsea and immediately re-joined Fulham on a season-long loan.

The Czech Republic international, who has made just two Premier League appearances for Chelsea, spent the 2016-2017 campaign with Fulham.

Fulham also has Lucas Piazon on loan from Chelsea as it seeks promotion from the Championship, having lost in the play-off semi-finals last season.

Chelsea's deal with Kalas follows its decision to allow fellow centre-back Kurt Zouma to spend next season on loan at Stoke City after signing a new six-year contract.