Pre-tournament favourite Rafael Nadal eased past America's Ryan Harrison 6-4, 6-2, 6-2 to record his 16th win on hard courts this year.
Defending champion Serena Williams crushed Italian veteran Francesca Schiavone, 6-0, 6-1. Her sister Venus, champion in 2000 and 2001, fought past Belgian 12th seed Kirsten Flipkens 6-1, 6-2.
Li Na reached the second round with a 6-2, 6-2 win over Olga Govortsova of Belarus.
Agnieszka Radwanska eased past Silvia Soler-Espinosa 6-1, 6-2.
Laura Robson won nine games in succession to beat Spanish veteran Lourdes Dominguez Lino, 7-5, 6-0.
Daniel Evans, making his debut after coming through qualifying, swept past Japanese 11th seed Kei Nishikori, 6-4, 6-4, 6-2.
Usain Bolt, a multiple Olympic and world champion, is an ardent cricket lover.
The midfielder represented England 106 times in a career spanning 15 years.
Saina Nehwal, seeded seventh, took just 31 minutes to dispose off Natalia Perminova.
Vijender Singh skipped the national trials in Patiala.
Russian tennis star looks to show her prowess at the US Open.
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