The former French striker was in attendance at the Emirates Stadium as Arsenal blitzed Tottenham on Sunday in the Premier League with three unanswered first half goals.
They went on to win the game 3-1, with Smith Rowe getting the first and Saka scoring the third goal for his side.
"Bukayo Saka and Smith Rowe, I think the team played really well especially in the first half," said Henry on Sky Sports.
"But then for me those two having a goal and an assist, Arsenal played that game as a derby as they should, I don't think Tottenham did especially in the second half.
"What a day, you want to see that more often than not, but for me the two kids, especially for the academy and what it represents.
"It is contagious, we need that Arsenal, we need this type of performance and that's why we care when the guys that add that DNA in them because they know what it is to win and not suffer against Tottenham."
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