But he was irritated that Lukaku was booked for his involvement.
Martinez said: "We were glad to see Hugo Lloris back on his feet.
"It was a strong incident, nothing malicious, two brave players fighting for the ball.
"Romelu did nothing wrong and he picked up a strong knock on his thigh and he has to come off as a consequence.
"I was really disappointed to see Romelu punished with a yellow card in what was an honest challenge, both players trying to get the ball."
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