Bryan Gil has joined Tottenham in a deal that involves Erik Lamela moving to Sevilla.
Bryan, who spent last season on loan from Sevilla at Eibar, is playing for Spain at the Tokyo Olympics.
Reports emerged last week that Spurs were close to signing the 20-year-old for a fee of £21.6million (€25m) plus Lamela, who joined the Premier League club from Roma in 2013.
While no fee has been confirmed, the deal has now gone through, subject to international clearance.
Bryan, who has represented Spain at senior level and has signed a five-year contract with Spurs, scored four times in 29 appearances last term, with 29-year-old Lamela netting three goals and providing one assist from 33 games in all competitions.
Lamela has penned a three-year deal with Sevilla, and will wear the number 17 shirt for the 2021-22 campaign.
The Argentina international made 257 appearances in all competitions during his eight-year stint with Tottenham.
Bryan, meanwhile, becomes Spurs' second signing under Nuno Espirito Santo, following on from the arrival of goalkeeper Pierluigi Gollini on loan from Serie A club Atalanta.
Spurs have also tied down Son Heung-min to a new contract, though uncertainty surrounds Harry Kane, who has been heavily linked with Manchester City.