Aryna Sabalenka of Belarus won her first round match against Rebeka Masarova of Switzerland during the 2025 U.S. Open Tennis Championship at the USTA Billie Jean King National Tennis Center in Flushing,

By Janina Nuno Rios NEW YORK (Reuters) -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.

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