Naomi Osaka’s return to the U.S. Open ended in the second round, but the two-time champion said she felt “grateful” as she departed after a straight-set loss to Karolina Muchova.

“It was really fun,” Osaka said after falling 6-3, 7-6 (7-5) against the 52nd-ranked Czech. “I felt very grateful that there were so many people cheering. I missed it a lot.”

She has been unable to build momentum during her comeback, and her first-round win over Jelena Ostapenko was her first against a Top-10 player in four years.