The South Korea international, who scored a brace in last weekend's 4-0 win over Stoke City, was once again in top form by constantly troubling the opposition throughout the game.
"He was incredible today," said Henry on Sky Sports.
"He put a couple of great crosses into the box and he should have had an assist if people went to meet his ball.
"He did not also score, but other than that I thought he destroyed Jason Denayer on the side, or whoever was in his zone."
Son was rumoured to be on the verge of leaving Spurs for Wolfsburg during summer, but Henry thinks that he now deserves a place in the starting eleven.
"He looked like it [to be leaving Spurs in the summer]," Henry added.
"But I think after what he has been doing, especially against Stoke the other week, and now he is showing that he deserves to play in that team."