Goals from Rodrigo and Luisao saw the Portuguese giants take a 2-0 lead, before Christian Eriksen pulled one back with a free-kick.
However, Luisao’s thumping strike seven minutes from the end secured a 3-1 win for the visitors and left us with plenty of work to do in the second leg next week.
Spurs: Lloris, Walker (Rose 76), Kaboul, Vertonghen, Naughton, Lennon, Paulinho, Sandro (Bentaleb 82), Eriksen, Kane (Soldado 75), Adebayor. Substitutes (not used): Friedel, Fryers, Townsend, Chadli.
Benfica: Oblak, Silvio, Luisao, Garay, Siquiera, Ruben Amorim, Fejsa, Sulejmani (Perez 65), Markovic, Oscar Cardozo (Gaitan 65), Rodrigo (Lima 87). Substitutes (not used): Artur, Andre Almeida, Jardel, Djuricic.
Goals: Spurs – Eriksen 64; Benfica – Rodrigo 29, Luisao 57, 83.
Yellows: Spurs – Sandro, Vertonghen; Benfica – Silvio, Rodrigo.
Referee: Jonas Eriksson (Sweden).