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.

World number one Aryna Sabalenka began her U.S. Open title defence in style with a 7-5 6-1 win over Switzerland's Rebeka Masarova in the first round on Sunday.