The game took a while to get going and we had to wait until the 70th minute for the breakthrough as Dele Alli converted Christian Eriksen's low ball in from the left.
Four minutes later it was 2-0 after Toby Alderweireld headed home Erik Lamela's free-kick and within two minutes of that it was wrapped up as Lamela ran onto Danny Rose's cross and drilled into the bottom corner.
Spurs (4-2-3-1): Lloris (c), Walker, Alderweireld, Vertonghen, Rose, Dier, Dembele, Lamela (Chadli 87), Alli (Mason 90+2), Eriksen, Kane (Son 89). Substitutes (not used): Vorm, Trippier, Wimmer, Carroll.
United (4-2-3-1): De Gea, Fosu-Mensah (Darmian 68), Smalling, Blind, Rojo, Schneiderlin, Carrick (c), Mata (Depay 77), Lingard, Martial, Rashford (Young 46). Substitutes (not used): Romero, Fellaini, Herrera, Valencia.
Goals: Spurs – Alli 70, Aldeweireld 74, Lamela 76.
Yellow cards: Spurs – Walker, Alli; United – Darmian, Depay, Young.
Referee: Mike Dean.