on Heung-min’s superb strike proved the winner as a Tottenham side without Harry Kane beat Premier League champions Manchester City.
Kane was absent from the Spurs squad amid transfer speculation over a potential move to City.
But without him, Spurs marked new boss Nuno Espirito Santo’s first match in charge with a home victory in front of a full crowd, as Son cut inside from the right before placing the ball into the bottom corner.
Jack Grealish, who signed for a record £100m fee from Aston Villa, made his City debut but was unable to inspire a comeback.
Team-mates Joao Cancelo and Fernandinho came close in the first half, while Son also had a shot deflected inches wide.