Defending champion Kim Clijsters struggled at times, but still managed to defeat Greta Arn, 6-0, 7-5, in the first round of the 2010 U.S. Open. Clijsters fell behind 4-0 in the second set before winning seven of the final eight games of the match.
The second-seeded Clijsters piled up 21 winners (Arn only had 11) and broke Arn's serve six times.