“Letting him come back was my big mistake”

“Did it complicate things to play against a Novak who was visibly injured?
I feel like I was in control of the match and let it come back. This is my biggest mistake today (Tuesday, defeat 4-6, 6-4, 6-3, 6-4). In the second set, I should have played better to push him to his limits. I could see he was having problems moving around in the second set. I should have pushed him a little more, but I didn’t. Afterwards, he started to feel better and he played at an incredible level. Yes, letting him come back was my big mistake. But when he plays at this level, it’s difficult. I had opportunities, it was a close match. But he won most of the important points. I repeat, when Novak plays at this level, it’s really difficult to find a solution.