The Iceland international netted the first goal in his bow for the club, with Iago Falque confirming the victory just before full-time, as Jan Vertonghen came off the bench
A debut goal from Gylfi Sigurdsson helped Tottenham to a 2-0 win in their pre-season clash with Stevenage at the Lamex Stadium.
The midfielder, who spent six months on loan at Swansea City last season, made an instant impact after coming on as a substitute in the second period as he drilled home the opening goal of the game from an Andros Townsend's corner.
The 22-year-old Iago Falque made it 2-0 just before full-time to make sure of the win.
New boss Andre Villas-Boas named a strong side ahead of the game with the League One side, with Michael Dawson, David Bentley, Aaron Lennon and Steven Pienaar all involved as they prepare for the new campaign.
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However, it was 18-year-old Harry Kane who proved to be at the centre of most of the Tottenham play, the striker twice going close inside the opening 30 minutes. First, he was denied by a stunning stop from Stevenage keeper Chris Day after latching onto a through-ball from Pienaar, before the youngster nodded a diving header just wide following an inch-perfect cross from Kyle Walker.
Despite dominating much of the first half, Spurs were unable to break the deadlock and the two teams headed to the break all square.
Villas-Boas made a number of changes during the interval, introducing both Sigurdsson and fellow new boy Jan Vertonghen to the fray.
And it didn't take long for the Icelandic international to make an impact, as he fired home fiercely from Townsend's corner 10 minutes into the second half.
Spurs' dominance was absolute despite making a large number of changes, and they were denied a second 18 minutes from time when Souleymane Coulibaly's effort was well saved by Steve Arnold after being put through by Sigurdsson.