New York: Novak Djokovic wasted no time in seeing off Argentinian challenger Diego Schwartzman on Monday as four former US Open champions reached the second round with varying degrees of difficulty.


Novak Djokovic after his win over Argentine Diego Schwartzman in Round 1 of the US Open. Pics/AFP 

World number one and top seed Djokovic defeated 79th-ranked Schwartzman 6-1, 6-2, 6-4, wrapping up the marquee match on Arthur Ashe Stadium court minutes before midnight.