The South Korea forward capitalised on a defensive lapse from returning Palace defender Mamadou Sakho to fire the hosts into an early lead, before visiting left-back Patrick van Aanholt inadvertently directed Spurs right-back Serge Aurier’s cross into his own net.
Son made it 3-0 moments later, connecting beautifully with another Aurier cross to fire a crisp volley beyond the stranded Vicente Guaita.
Erik Lamela finished off another flowing move involving Son and Harry Kane to complete the scoring with three minutes of the first period remaining.
Son and Lamela went close to adding further gloss to the scoreline after the restart, while Gary Cahill and Cheikhou Kouyate forced Hugo Lloris into action at the other end.
Pochettino revealed he held an hour-long meeting with his squad this week in order to “refocus” his players’ minds following an indifferent start to the campaign.
Spurs had won only once in the league this season before today – at home to Aston Villa in their opening game of the campaign – while midfielder Christian Eriksen was heavily linked with a move away from the club before the end of the European transfer window.
Whatever Pochettino told his players in the meeting, it worked.
The hosts roared out of the traps at the Tottenham Hotspur Stadium, overwhelming a Palace side who had conceded only two league goals before the game.
