A week behind us brought just one ATP 250 tournament and it wasn't enough to see the big changes at the top of the rankings, with the best players preparing for the fourth Grand Slam of the season that starts today.
Kei Nishikori is the only new player in the Top 20 and the biggest battle is reserved for New York, with 2000 points up for grabs. Rafael Nadal is spending his 187th weeks as world number 1 and he has to defend the title at the US Open to stay safe ahead of Roger Federer who has a chance of passing him if he wins the title and the Spaniard loses before the semis.
Juan Martin del Potro is 1500 points behind Roger and he has to defend the points for the last year's semi-final, beating Roger in the quarter-final clash. Del Potro and Alexander Zverev have to win the title and to see Roger falling before the third round in order to take the second place from him, which is unlikely to happen.
The German is 655 points behind the Argentinian and he seeks his first deep run at the US Open with Ivan Lendl in his coaching box. Last year's US Open finalist Kevin Anderson is just 230 points behind the German but he has to play well in order to keep his points, with Rafael Nadal waiting in the quarter-final.
A former US Open winner Novak Djokovic has no points to defend until the end of the season and he is one of the main favorites for the title in New York, targeting the Top 3 spot for the first time since May last year.
Marin Cilic is leveled with Novak in terms of points and he has a nice lead ahead of Grigor Dimitrov and Dominic Thiem who are both struggling to find the winning form in the recent months, hoping for a much better result at the US Open.
David Goffin closes the Top 10, 235 points ahead of John Isner who is the biggest hope of the Americans in New York. A former US Open finalist Kei Nishikori has gained two places on the list to enter the Top 20 despite winning just one match in Toronto and Cincinnati, looking to improve his tally in the following months with no points to defend until the end of the season.
Winston-Salem champion Daniil Medvedev is on a career-high 36th place and he is by far the biggest mover in the Top 100, with no new players in the elite group. Top 20 rankings list:
1. Rafael Nadal (ESP) 10040
2. Roger Federer (SUI) 7080
3. Juan Martin del Potro (ARG) 5500
4. Alexander Zverev (GER) 4845
5. Kevin Anderson (RSA) 4615
6. Novak Djokovic (SRB) 4445
7. Marin Cilic (CRO) 4445
8. Grigor Dimitrov (BUL) 3790
9. Dominic Thiem (AUT) 3485
10. David Goffin (BEL) 3435
11. John Isner (USA) 3200
12. Pablo Carreno Busta (ESP) 2425
13. Diego Schwartzman (ARG) 2380
14. Fabio Fognini (ITA) 2190
15. Stefanos tsitsipas (GRE) 2042
16. Kyle Edmund (GBR) 1935
17. Lucas Pouille (FRA) 1915
18. Jack Sock (USA) 1815
19. Kei Nishikori (JPN) 1755
20. Borna Coric (CRO) 1735