Melbourne VIC, Australia, 3 March 2015 |

Aussie James Duckworth has moved to within just a few spots of the top 100 after a run to the ATP Challenger final in Kolkata, India.

The New South Welshman rose seven places to a career-high mark of No.104 in the latest ATP rankings.

Should he crack this elite ranking class, he would become the sixth top-100 ranked Australian, behind Nick Kyrgios, Bernard Tomic, Sam Groth, Marinko Matosevic and Lleyton Hewitt.

Tomic rose four places this week to return to the top 40 at No.38; he did so following a run to the quarterfinals at the ATP 500 event in Acapulco.

Matosevic, who reached the second round at the same tournament, jumped eight places to No.72.

Thanasi Kokkinakis, who qualified for the Acapulco event, moved up five places to a career-high ranking of No.133.

> check out where the Aussies stand in the latest ATP rankings

Nearing their career-high ranking is John Millman, who this week rose 11 places to 137th; the Queenslander’s latest rise comes following his appearance in the ATP Challenger final in Kyoto.

Incredibly, Millman was ranked outside the world’s top 1,000 as recently as August.

His highest-ever ranking is 126th, a mark reached in April 2013.

Meanwhile, Ben Mitchell’s second-round finish in Kyoto saw him ascend nine places to a new career-high ranking of No.204.

He looks poised to join 12 other Aussies already inside the world’s top 200.

> view the latest Australian rankings