Popyrin rose 32 places to a career-high No.82 on Monday on the back of his win in Singapore.

The 21-year-old had to overcome world No.3 Marin Cilic in the semi-finals and Russian Alexander Bublik in the final, which Popyrin won 4-6 6-0 6-2.

"I don't think it's a feeling I will ever feel again, to be honest. It was an unbelievable feeling, to win my first ATP title," Popyrin said after the final.

But Popyrin says he's not looking at the rankings and is just focused on his game.

"It's a good feeling but I'm striving for much bigger," he said.

"I wasn't looking at the rankings last year when I was having a pretty bad year and I'm not looking at the rankings this year.

"I go through things just tournament by tournament. I focus on my game, I focus on my craft and the ranking will come."

There were no changes in the top 10 but world No.1 Novak Djokovic claimed a milestone on Monday with his 310th week at the top.

The Serb has now equalled Roger Federer's record for the most weeks spent at the top of the men's rankings.

Djokovic will break Federer's record on March 8. American great Pete Sampras is third on the list with 286 weeks.

Meanwhile, if No.3 Daniil Medvedev reaches the final at the Rotterdam Open he will overtake Rafael Nadal and move to a career-high No.2.

In the women's rankings, Ash Barty holds her spot at No.1, followed champion Australian Open champion Naomi Osaka, Simona Halep, Sofia Kenin and Elina Svitolina.

Australian Associated Press