World No.1 Novak Djokovic has survived a scare against Poland's Jerzy Janowicz in the opening round of the US Open.

A clearly rusty Djokovic, won a scratchy first set, before losing the second. However, heย rallied, to win the final two sets, and record a 6-3, 5-7, 6-2, 6-1 win.

Spaniard Rafael Nadal cruised through his opening round match, defeatingย Denis Istomin of Uzbekistan 6-1 6-4 6-2.

Australian youngster Jordan Thompson blew a two set to love lead against Belgian Steve Darcis, losingย 5-7 3-6 7-6 (7-5) 6-4 7-5.

Meanwhile, fellow Aussie James Duckworth recorded the biggest win of his career, defeatingย experienced Dutchman Robin Haase in five sets.

NEW YORK, NY - AUGUST 29: James Duckworth of Australia returns a shot to Robin Haase of the Netherlands during his first round Men's Singles match on Day One of the 2016 US Open at the USTA Billie Jean King National Tennis Center on August 29, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
James Duckworth of Australia returns a shot to Robin Haase of the Netherlands during his first round Men's Singles match on Day One of the 2016 US Open. (Photo by Al Bello/Getty Images)

The Australian wildcard won the matchย 4-6 7-5 6-3 4-6 6-3.

The 24-year-old will now face ninth seed Jo-Wilfred Tsonga in the second round.