Maria Sakkari, Bianca Andreescu advance to U.S. Open round of 16

No. 17 seed Maria Sakkari of Greece recorded nine aces while posting a 6-4, 6-3 upset victory over 10th-seeded Petra Kvitova on Saturday in New York to reach the round of 16 at the U.S. Open.

Sakkari had 19 winners against 16 unforced errors while playing a cleaner game than two-time Wimbledon champion Kvitova. The Czech Republic native committed 34 unforced errors while accumulating just 16 winners.

Perhaps most impres