Alli pounced on a lapse from Watford goalkeeper Ben Foster and used his shoulder to control the ball before firing into the empty net in the 86th minute, cancelling out Abdoulaye Doucoure’s sixth-minute opener for the visitors.
Watford, who had had a penalty claim turned down when Gerard Deulofeu was felled by Jan Vertonghen, claimed Alli had used his arm and were incensed by the turnover, which left...