Serena Williams set up a third-round showdown at the U.S. Open against her older sister by hitting 13 aces and overwhelming 101st-ranked Carina Witthoeft of Germany 6-2, 6-2 in a little more than an hour.
Serena Williams set up a third-round showdown at the U.S. Open against her older sister by hitting 13 aces and overwhelming 101st-ranked Carina Witthoeft of Germany 6-2, 6-2 in a little more than an hour.