Harry Kane fired us into a first half lead, with Hugo Lloris making a string of fine saves as the game went on.
However, he was powerless to prevent Demba Ba grabbing an 89th minute leveller from the penalty spot after a handball decision against Vlad Chiriches.
Spurs: Lloris, Dier, Chiriches, Fazio, Davies, Bentaleb, Stambouli (Dembele 65), Paulinho (Lennon 60) Kane, Townsend, Soldado (Adebayor 79). Substitutes (not used): Vorm, Naughton, Kaboul, Lamela.
Besiktas: Zengin, Kurtulus, Franco, Sivok, Motta, Hutchinson, Kavlak (Ozyakup 65), Tore (Koyunlu 82), Sosa, Sahan (Pektemek 72), Ba. Substitutes (not used): Gonen, Koybasi, Uysal, Gulum.
Goals: Spurs – Kane 27; Besiktas – Ba 89 (penalty).
Yellows: Spurs – Davies, Bentaleb, Fazio; Besiktas - Ba.
Referee: Manuel Grafe (Germany).