The WTA Finals are underway, and reigning US Open champion Aryna Sabalenka is off to an impressive start with her Round 1 performance.

Factbox on Japan's Naomi Osaka, who beat Victoria Azarenka of Belarus 1-6 6-3 6-3 to win the U.S. Open title on Saturday.

LONDON, Sept 10 (Reuters) - Four new tournaments were added to the provisional ATP calendar for the remainder of the 2020 season while the WTA added an event in the Czech Republic in October, the ...