New York, NY, United States (4E Sports) – Top seed Novak Djokovic needed just 87 minutes to beat Paul-Henri Mathieu, 6-1, 6-3, 6-0, and advance to the third round of the US Open Thursday.
Djokovic, the 2011 champion, lost just five of his first service points, hit 13 aces and converted seven of his 12 break points to advance against Sam Querrey, who extended his perfect record to 4-0 versus Guillermo Garcia-Lopez via a 6-3, 6-4, 6-4 win.
Querrey hit 16 aces and lost just six of his first service points for victory in one hour and 45 minutes.
Meanwhile, John Isner fired 30 aces en route to a 7-6(5) 6-4, 6-2 win over Jan-Lennard Struff.
For a third straight year, the 13th seed Isner will next play No. 22 seed Philipp Kohlschreiber in the third round.
Kohlschreiber was leading Michael Llodra, who is contesting his final Grand Slam championship, 6-2, 15/0 when the Frenchman retired.
Isner will go for his first win over the German at Flushing Meadows. Kohlschreiber beat Isner 6-4, 3-6, 4-6, 6-3, 6-4 in the 2012 third round and 6-4, 3-6, 7-5, 7-6(5) at the same stage last year.
Tenth seed Kei Nishikori also advanced when his Spanish opponent, Pablo Andujar, retired when trailing 6-4, 6-1 after 63 minutes of play.
In other matches, Jo-Wilfried Tsonga downed Aleksandr Nedovyesov, 6-3, 6-4, 6-4; Leonardo Mayer beat Matthew Ebden, 6-1, 6-3, 6-4; and Pablo Carreno Busta defeated Benoit Paire, 6-1, 6-4, 3-6, 6-3.
On the women’s side, five-time champion Serena Williams made it to the third round after beating Vania King, 6-1, 6-0.
Williams will next take on Varvara Lepchenko, who eased past German Mona Barthel 6-4, 6-0.
Victoria Azarenka also made it to the next round after beating Christina McHale, 6-3, 6-2. Up next for Azarenka will be Russian Elena Vesnina, who slipped past New Zealand’s Marina Erakovic 7-5, 2-6, 6-4.
Eighth seed Ana Ivanovic was not as lucky as she fell to Karolina Pliskova, 7-5, 6-4.
Other winners were Flavia Pennetta, Nicole Gibbs, Casey Dellacqua and Barbora Zahlavova Strycova.