One break of serve was enough for Jordan Thompson as he advanced to the second round of the ATP Tour’s New York Open with victory over Ivo Karlovic.

World No.63 Thompson proved too consistent for big-serving Croatian veteran Karlovic and won through 6-3 7-6 (7-2).

A solid serving performance, which included six aces, helped Thompson keep his 40-year-old opponent at bay.

Next up for the Sydneysider is another big-serving challenge in American top seed John Isner.

In Tuesday’s other match to date, Kwon Soon Woo of South Korea defeated Bernard Tomic’s conqueror in qualifying, Japan’s Go Soeda, 6-2 6-7 (2-7) 6-3.