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.

Aryna Sabalenka began her US Open title defence in convincing fashion, needing just 81 minutes to overcome Rebeka Masarova on Arthur Ashe Stadium. The world number one, who has fallen in two Grand Slam finals this season,