NEW YORK (AP) -- The latest on the U.S. Open (all times local):
Young American Madison Keys has reached the third round at the U.S. Open for the first time.
The 19th-seeded Keys needed just 54 minutes to beat 100th-ranked Tereza Smitkova of Czech Republic 6-1, 6-2 on Wednesday in a matchup of 20-year-olds.
Keys has now advanced to at least the third round at every major this year, which started with her breakthrough run to the semifinals at the Australian Open.
Keys, who didn't face a break point Wednesday, could meet Serena Williams in the fourth round. Before that, she could play 15th-seeded Agnieszka Radwanska, who beat her in three sets in the Wimbledon quarterfinals. Radwanska takes on a fellow Polish player, 91st-ranked Magda Linette, later Wednesday.