Wawrinka lost to Monfils in the Rotterdam final. ANP/AFP/Robin van Lonkhuijsen
The three-time Grand Slam champion is on the road back to his best after serious knee injuries and reached his first final last week since losing to Novak Djokovic at Roland Garros in 2017.
The 33-year-old Swiss was beaten in three sets by Gael Monfils, though, with the Frenchman climbing 10 spots to 23rd.
Wawrinka sits 41st in the rankings after a rise of 27 places.
ATP top 20
1. Novak Djokovic (SRB) 10,955 pts
2. Rafael Nadal (ESP) 8,320
3. Alexander Zverev (GER) 6,475
4. Juan Martin del Potro (ARG) 5,060
5. Kevin Anderson (RSA) 4,595
6. Kei Nishikori (JPN) 4,190 (+1)
7. Roger Federer (SUI) 4,100 (-1)
8. Dominic Thiem (AUT) 3,800
9. John Isner (USA) 3,225
10. Marin Cilic (CRO) 3,140
11. Karen Khachanov (RUS) 2,880
12. Stefanos Tsitsipas (GRE) 2,805
13. Borna Coric (CRO) 2,605
14. Milos Raonic (CAN) 2,275
15. Daniil Medvedev (RUS) 2,230 (+1)
16. Fabio Fognini (ITA) 2,225 (-1)
17. Marco Cecchinato (ITA) 2,091 (+1)
18. Roberto Bautista Agut (ESP) 1,955 (-1)
19. Diego Schwartzman (ARG) 1,940
20. Nikoloz Basilashvili (GEO) 1,820
Selected:
41. Stan Wawrinka (SUI) 1,040 (+27)