Lyon midfielder Tanguy Ndombele has joined Tottenham in a club-record £56.5 million deal with the potential for a further £8.5m to be paid in bonuses.
The 22-year-old France international has signed on until 2025.
Ndombele made 49 appearances for Lyon last season, including eight Champions League starts, scoring three goals.
Ndombele signed for Lyon last summer from SC Amiens for €25m, going on to be named in the team of the year for both the Champions League and Ligue 1.
Champions League runners-up Spurs, who didn't spend a penny last season, previously set their transfer record with the signing of Colombia international defender Davinson Sanchez for £36m in 2017.
Earlier on Tuesday, Spurs announced Leeds United winger Jack Clarke had joined the club in a deal worth a reported £10 million.
Clarke, 18, passed a medical last week and will be loaned back to the Championship side for next season.