Chelsea have signed Portugal forward Joao Felix from Atletico Madrid for a fee in the region of £45m, with England midfielder Conor Gallagher going the other way for about £33m.
Felix, 24, who has signed a seven-year deal to begin a second spell at Stamford Bridge, scored four goals in 20 appearances during a loan spell in west London in 2023.
"I’m really happy to be back at Chelsea and I can’t wait to get started," said Felix. "I can see some familiar faces from the last time I was here, which is always nice.