Victoria Azarenka said she was very happy to have won a high quality match against German Angelique Kerber to reach the US Open fourth round on Saturday.
The 12th seed won in three sets 7-5, 2-6, 6-4 in an exciting encounter which lasted two hours and 52 minutes.
In a chat with reporters afterwards, Azarenka said she had to dig deep to come out victorious.
"I think it's great for our sport to be able to produce this kind of high-quality match.
"I congratulate Angelique because she really pushed me to give my best, to really to dig deep and find resources to make it happen," she added.
The Belarusian, who had been struggling with some niggling injuries prior to the US Open said she missed not playing while recovering from injury.
"Probably the most you can miss when you're an athlete, not just a tennis player," Azarenka said. "That intensity, that feeling of the battle is personally that's what I live for.
"Every moment in today's match was really intense and tough. I just tried to stay focused and tried to give my best at every point.
“She was playing some incredible tennis. It was amazing how we both were pushing each other," she added.
Azarenka will next face unseeded Varvara Lepchenko, who beat Mona Barthel of Germany 1-6, 6-3, 6-4 and is the only American still alive in the bottom half.