Brighton have signed Spain defender Marc Cucurella from Getafe on a five-year deal.
Cucurella, 23, who can play either as a left-back or as a wide midfielder, joins for a fee believed to be £15.4m.
The Barcelona academy graduate helped Spain win silver at the Tokyo Olympics this summer.
The Seagulls have also signed Slavia Prague and Senegal striker Abdallah Sima, 20, and immediately loaned him to Championship side Stoke City.
He joins Brighton on a four-year deal for an undisclosed fee. Sima scored 16 goals and made seven assists in 39 games for the Czech double winners last season.
Brighton have sent Ecuador midfielder Moises Caicedo to Belgian side Beerschot on a season-long loan.
The 19-year-old made his debut in Tuesday's 2-0 win over Cardiff City in the Carabao Cup.
On Cucurella, Albion boss Graham Potter said: "We have been keen to bring Marc to the club, and we are really pleased to finally welcome him here.
"He has had a fantastic education in the youth teams at Barcelona and he has gone on to make a real impression in La Liga and within the national set-up.
"He is a versatile player, and he will add competition and options to the squad."
Cucurella becomes the Seagulls' third summer signing after Enock Mwepu and Kjell Scherpen.
Find all the latest football transfers on our dedicated page.
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