Tottenham overtook Arsenal as they climbed to fifth place in the Premier League table by defeating bottom side Swansea City at a sodden Liberty Stadium.
With Harry Kane left on the bench, his deputy Fernando Llorente headed home against his former club from what appeared to be an offside position to put the dominant visitors ahead.
Having initially set out to contain Spurs, Swansea grew in belief in the second half and had chances to equalise, most notably when Mike van der Hoorn's header hit the post.
But after surviving spells of home pressure, Spurs launched an 89th-minute counter-attack and Kane found Dele Alli, who had his initial shot saved by Lukasz Fabianski before scoring with the rebound.
Alli's goal guaranteed Tottenham's third successive league win and inflicted a first defeat for Swansea under new manager Carlos Carvalhal as the Welsh club stayed at the foot of the table, four points adrift of safety.