Aryna Sabalenka starts defense of U.S. Open title with solid victory
Moderated by Tomas Kauer 
(Photo credit: Robert Deutsch-Imagn Images)
The first round of a major can be tricky for the world's No. 1 player and defending champion. Especially when it's the last major of the year in New York.
But Aryna Sabalenka made the proceedings look very routine in a 7-5, 6-1 win over Switzerland's Rebeka Masarova in her first match at the U.S. Open.
Since winning the U.S. Open 50 weeks ago, Sabalenka has
