ATP Rankings: 250th week as World No. 1 for Djokovic

Novak Djokovic remains first ahead of Rafael Nadal to mark the Serb's 250th week as World No. 1, a record only bettered on four occasions in the past.

Novak Djokovic, winner of the last three Grand Slam tournaments, remains on top of the ATP rankings.

Former World No. 1 Roger Federer has returned to third in the ATP rankings released on Monday, replacing Alexander Zverev after the reigning champion was knocked out of the Munich Open at the quarterfinals stage.

Federer, who has won a record 20 Grand Slams, is making his return to clay at the Madrid Open this week after three years' absence.

Elsewhere, Stefanos Tsitsipas takes ninth spot from American John Isner following the Greek's victory at the Estoril Open.

Novak Djokovic remains first ahead of Rafael Nadal to mark the Serb's 250th week as World No. 1, a record only bettered on four occasions in the past.