Defending champion Aryna Sabalenka moved into the second round of the US Open on Sunday after weathering a challenging first set in her first match. The No. 1-ranked player took down Swiss player Rebeka Masarova 7-5,

Defending champion Aryna Sabalenka moved into the second round of the U.S. Open after weathering a challenging first set in her first match.

The defending champion, Aryna Sabalenka, started her US Open campaign on the right foot, defeating Switzerland's Rebeka Masarova 7-5, 6-0. The world No.