NEW YORK — The Serena Williams juggernaut rolls into the third round of the U.S. Open on Friday as the American world number one continues her bid to complete a rare calendar grand slam of the coveted singles titles.
Aiming to become just the fourth woman to win all four slams in the same year, Williams will take on compatriot Bethanie Mattek-Sands in the first match of the evening at Arthur Ashe Stadium.
"I never stop. I keep going and give the best effort that I can," Williams said after improving her 2015 match record to 50-2 with an error-strewn 7-6(5) 6-3 victory over Dutchwoman Kiki Bertens on Wednesday.