Brazilian right-back Rafael has agreed to move to Lyon from Manchester United.
Leeds are set to complete the signing of Stuart Dallas from Brentford, according to Sky sources.
Brighton have completed the signing Latvia international Vitalijs Maksimenko from Skonto Riga.
Albion persuaded the versatile 22-year-old to move to the Amex Stadium, despite interest from a number of Premier League and Championship clubs in recent months.
Brighton manager Gus Poyet has sealed a deal for the player after he impressed during a training spell with the Seagulls late last year.
But the Albion boss has indicated Maksimenko is a long-term prospect, and unlikely to feature in the coming weeks for the club.
Poyet said: "We have been aware of him for a while. He can bring more quality to our first-team in the future.
"He has quality on the ball. He'll train with the development squad to learn the way we play. Then it's up to him."