The 32-year-old collected his fifth Wimbledon title and 16th major Sunday with a thrilling five-set win over Roger Federer, a match that last three minutes short of five hours.
Taking a two-week break for the Davis Cup will take a toll in Prajnesh's ranking but the left hander is not bothered.
Novak Djokovic leads the men's ATP tennis rankings released Monday ahead of French Open champion Rafael Nadal and former world number one Roger Federer.
Despite winning his 12th French Open, Nadal remains in second while Barty's triumph helped her climb to No.2 behind Osaka.
The Serb has 12,115 points ranking first, followed by Spain's Rafael Nadal (7,945) and Roger Federer of Switzerland (5,770), reports Xinhua news agency.
Djokovic, winner of the last three Grand Slam tournaments, is now over 3,000 points clear of old rival Nadal
The Serb is almost 2,500 points ahead of Rafael Nadal while third-placed Alexander Zverev will hope to pick up points at the Marrakech claycourt event this week.
The Swiss great switched places with Austria's Dominic Thiem, who had briefly climbed to fourth after defeating Federer in the final at Indian Wells two weeks ago.
Prajnesh also said being the No.1 player or the No. 2 in the team does not matter much once he steps on the court.
Djokovic takes over as world number one in the latest ATP rankings published Monday from Rafael Nadal, who withdrew injured from Paris on Wednesday.
The Wimbledon and US Open champion becomes the first player to start the season outside the top 20 and end up top of the ATP rankings since Marat Safin in 2000.
Divij Sharan, who has been one of the most consistent players on the doubles circuit with partner Artem Sitak, has held the numero uno position in the country for the first time in his career.
Djokovic overtook Switzerland's Roger Federer in the standings, pushing him down to third.
Only one change affected the top 10 with Kevin Anderson of South Africa moving from ninth to eighth place while the biggest winner of the week was Georgia's giant-killer Nikoloz Basilashvili.
Djokovic has been using the modern facilities to gather his strength for a rousing finale to a season in which he has risen from the ashes after a difficult 2017.