Son scored a double at Villa Park, including a winner deep into stoppage-time, to clinch a 3-2 victory and haul Spurs to within a point of the Champions League places.
The South Korea international earlier missed a penalty which was saved by Pepe Reina before converting the rebound in a hit-and-miss display to give Tottenham a 2-1 lead after Alderweireld had scored at both ends within the first half-hour.
His second was more characteristic of the bustling forward, as he picked up the ball after a Bjorn Engels mistake and sprinted through the Villa half before slotting home past the Villa goalkeeper.
Son has now scored six goals in five matches, and though he was Tottenham’s saviour on Sunday, his finishing was poor on occasion and Mourinho couldn’t resist a cheeky pop at his player after this whistle.
While Son was being questioned by a member of the Tottenham media team in the Villa Park tunnel, Mourinho interrupted the interview to ask: “You speaking about the goals he scored or the goals he missed?”
The joke was well-received by Son, who shared a laugh with his manager before turning back to the camera to continue the interview.
The Portuguese manager expects more from the attacker in front of goal, especially during Harry Kane’s injury layoff.
Speaking in his post-match press conference, Mourinho admitted as much, stating that while he was happy with the win, his team should have wrapped up the match much earlier owing to the number of chances they had.
The Portuguese also said he is not happy that his Spurs team have been asked to play today, rather than earlier in the weekend, ahead of their Champions League meeting with RB Leipzig on Wednesday.
“You can tell me it was because your game was chosen to be on TV on Sunday at 12 o’clock [sic] and I ask you, in the other five matches of the Premier League this weekend, there is not another one that could be played on Sunday? It’s as simple as that.
“That’s the only thing I say – there is no care. They just chose what they want and they don’t think how they can hurt an English team. And in this case we are going to be hurt because we are going to play on Sunday 2 o’clock when we could perfectly play on Saturday or Friday night?”