Roger Federer equalled Pete Sampras' record of 286 weeks on top of the world rankings on Monday when his return to the world number one spot was confirmed.
By winning his seventh Wimbledon title - a tally Sampras also managed - with victory over Andy Murray on Sunday, Federer ended Novak Djokovic's 12-month reign as the world's top-ranked player.
The Swiss climbs from third to first on the new list, also moving above Rafael Nadal, who drops to third afer his shock second-round exit in SW19.
Federer, now 30, is the second oldest male number one. Andre Agassi held the top spot when aged 33.
He last held the number one ranking in June 2010 when defeat to Robin Soderling in the quarter-finals of the French Open left him one week shy of Sampras' record.
With none of leading players in action this week and no points to come off from last year, Federer is guaranteed to claim the record outright next Monday.
Beaten finalist Murray remains fourth in the list.
In the ATP's doubles rankings, new Wimbledon champion Jonny Marray is up to 21st, a position which makes him the new British number one in the format.
Meanwhile, Victoria Azarenka returned to the top of the WTA rankings on Monday despite losing in the semi-finals of Wimbledon.
"Every day, I work with my team to become the best player I can possibly be. To be listed among the other players who also reached number one is an honour," said Azarenka.
"This year has already been the best of my career and I am looking forward to the second half of the season."
Maria Sharapova's fourth-round defeat to Sabine Lisicki saw her lose her number one status. She drops to third.
Wimbledon champion Serena Williams climbs from sixth to fourth with runner-up Agnieszka Radwanska up to a career-high of second.
Briton Heather Watson is also upto a career high - 79th - following her run to the third round in SW19.
She is now within four places of compatriot Anne Keothavong and could replace her as British number one next week.
That will depend upon both players' results at this week's Bank of the West Classic in California. Williams also makes a quick return to action at the tournament.
