Son scored twice, including a last-gasp winner, to secure a 3-2 win for the visitors.
But after the game, Mourinho decided to wind-up the South Korean during a post-match interview about his missed chances.
Mourinho interrupted the interview to ask: "You speaking about the goals he scored or the goals he missed?"
"You speaking about the goals he scored or the goals he missed?!"
Jose steps in on Sonny's post-match interview! #THFC#COYSpic.twitter.com/LJtRmL5gES
— Tottenham Hotspur (@SpursOfficial) February 16, 2020