Novak Djokovic dropped one place to fifth with Stanislas Wawrinka moving up to fourth in the ATP rankings published on Monday.
Former world number one Djokovic will likely fall further by the end of the year as he has already announced he will not play again this season due to an elbow injury.
The main move saw German Alexander Zverev climb three places to a career high eighth.
Argentina's leonardo Mayer was the biggest mover, up 89 places to 49th following his victory in the Hamburg Open.
And there was consolation for German beaten finalist Florian Mayer, who still moved up 45 spots to 56th.
Briton Andy Murray remains on top ahead of Rafael Nadal with Roger Federer third.
Pliskova stays on top
Madrid: Czech tennis player Karolina Pliskova continued to lead the Women's Tennis Association (WTA) rankings released on Monday with 6,751 points.
This week's rankings remained unchanged as Romanian player Simona Halep came second, followed by German Angelique Kerber, who used to lead the rankings, reports Efe.
Recently crowned Wimbledon champion Spain's Garbiñe Muguruza came fourth, ahead of fifth-placed Ukraine's Elina Svitolina.
ATP rankings: 1. Andy Murray (GBR); 2. Rafael Nadal (ESP); 3. Roger Federer (SUI); 4. Stan Wawrinka (SUI); 5. Novak Djokovic (SRB); 6. Marin Cilic (CRO); 7. Dominic Thiem (AUT).
wta rankings: 1. Karolina Pliskova (CZC); 2. Simona Halep (ROM); 3. Angelique Kerber (GER); 4. Garbiñe Muguruza (ESP); 5. Elina Svitolina (UKR); 6. Caroline Wozniacki (DEN; 7. Johanna Konta (GBR).