Chelsea, on Wednesday, announced transfer deals for two players, Lesley Ugochukwu and Marc Guiu.
The Blues in a separate statement on their website, announced that Ugochukwu has completed a permanent transfer to Premier League side Burnley.
It added that Guiu has left Stamford Bridge for Sunderland on a season-long loan.
Recall that Ugochukwu had joined Chelsea from French Ligue 1 side Rennes two years ago
The midfielder made 15 appearances for the Premier League west London club in his first season.
The Frenchman later joined Southampton on loan for the 2024/25 campaign.
Guiu, meanwhile, will continue his development at the newly-promoted club Sunderland.
The 19-year-old striker made 16 appearances for Chelsea last season after arriving from Barcelona.
He struck six goals during Chelsea’s successful Conference League campaign.
Guiu also played for Enzo Maresca’s side at the FIFA Club World Cup as they went on to be crowned champions after beating Paris Saint-Germain in the final.
This is coming less than a week after Chelsea announced another transfer deal for two players, Mamadou Sarr and Leo Castledine.