None of the so-called Big Three of men's tennis－Roger Federer, Rafael Nadal and Novak Djokovic－was in the No 1 or No 2 spots in the ATP rankings on Monday, the first time that's been the case in nearly 20 years.

Daniil Medvedev rose one place to return to No 1, where he briefly spent time earlier this season, and Alexander Zverev moved up to a career-best No 2.

Djokovic slid from No 1 to No 3, because his points for winning the French Open in 2021 dropped off his record o

n Monday. The ATP rankings are based on a player's top 18 tournament results over the preceding 52 weeks (19 if he participated in the ATP Tour Finals).

There was not nearly as much shifting in the WTA rankings on Monday, with Iga Swiatek remaining at No 1. The only change in the women's top 20 was Aryna Sabalenka's move from No 6 to No 5, switching with Maria Sakkari.

Last year's French Open was delayed a week from its originally scheduled spot on the calendar because of concerns about COVID-19, so points earned from that event are falling off only now, while this year's French Open points were added last week, because the final was June 5.