Mauricio Pochettino felt Tottenham paid the price for a testing week after slipping to a 4-2 defeat against Arsenal in the north London derby.
Spurs had trailed 1-0 following Pierre Emerick-Aubameyang's early penalty but hit back through Eric Dier's equaliser and a spot-kick of their own from Harry Kane at Emirates Stadium.
But Aubameyang's stunning 56th-minute leveller set Arsenal on their way to a turnaround of their own, with Alexandre Lacazette and Lucas Torreira completing the comeback before Jan Vertonghen's red card ended any slim hopes of another Spurs comeback.