Alexander Zverev of Germany remained world No. 3, followed by Argentina's Juan Martin del Potro and South Africa's Kevin Anderson. Meanwhile, Dominic Thiem of Austria, John Isner of the United States and Marin Cilic of Croatia held onto their eighth, ninth and 10th positions in this week's classification.
Gael Monfils of France jumped 10 places to be ranked 23rd in the list following his victory at the Rotterdam Open on Sunday, while Stan Wawrinka of Switzerland rocketed 27 places up to world No. 41, thanks to being a runner up at the same tournament. The current top-10 ATP rankings and point scores are as follows:
3. Alexander Zverev (Germany) 6,475 4. Juan Martin del Potro (Argentina) 5,060
5. Kevin Anderson (South Africa) 4,595 6. Kei Nishikori (Japan) 4,190
7. Roger Federer (Switzerland) 4,100 8. Dominic Thiem (Austria) 3,800
9. John Isner (United States) 3,225 10. Marin Cilic (Croatia) 3,140.