Paris: Rafael Nadal described as "unbelievable" his climb back to the world number one spot for the first time in three years and confirmed in the latest ATP rankings released on Monday.
The Spaniard, who learned he was going to reclaim the ATP summit a week ago, last topped the men's charts in July 2014.
The 31-year-old Spaniard, who won his 15th Grand Slam title this year at Roland Garros, deposes Britain's Andy Murray, who withdrew from the tournaments in Montreal and Cincinnati with a hip injury.
Nadal, who has spent 141 weeks in the top spot, has struggled with knee injuries since first becoming No 1 in August 2008 after a Cincinnati semi-final run. He has admitted doubting he could ever regain the number one spot after so many years.
"Being No. 1 after all the things that I have been going through the last couple of years is something unbelievable," the Spanish great told the ATP.
Nadal, knocked out in the Cincinnati quarter-finals last week by Australian Nick Kyrgios, had slipped to as low as 13th in the ATP rankings midway through 2015.
And his path back to the top one week before the closing Grand slam of the season at the US Open was hailed by Chris Kermode, ATP Executive Chairman and President.
"To regain the No 1 ranking nine years after having first reached it is unprecedented," he said.
"Rafa has been setting records throughout his remarkable career and this one is as impressive as any. It shows incredible dedication and longevity, and we congratulate him on this amazing achievement."
Kyrgios's progress to Sunday's Cincinnati final earned him a five-rung rise to 18th with the man who beat him, Bulgarian Grigor Dimitrov, breaking into the top 10 in 9th.
Cincinnati winner Garbine Muguruza of Spain has climbed three places to third in the latest WTA rankings published on Monday.
The Wimbledon champion beat Simona Halep in Sunday's final, that defeat thwarting the Romanian's bid to overhaul Karolina Pliskova as world number one a week before the final Grand Slam of the season at the US Open.
Halep trails Pliskova by just five points with the US Open on the horizon. The Cincinnati final was Halep's third chance in 2017 for clinching the top spot in the WTA ranking, but just like at the French Open and Wimbledon, she failed to win when it mattered the most.
Former World No 1 Angelique Kerber has moved down three spots to number six.
American Sloane Stephens continued her brilliant comeback from a long-term foot injury, making her second straight semi-final in two weeks. Stephens jumped 67 spots to climb to 84 in the latest rankings.
With inputs from AFP.
Updated Date: Aug 21, 2017 15:20 PM