Cape Town - South African tennis star Kevin Anderson has slipped to No 6 in the latest ATP Tour rankings.
The 32-year-old has been struggling with an elbow injury of late which prevented him from defending his New York Open title last month.
When the latest ATP Tour rankings were released on Monday Anderson found himself slipping from down a spot to No 6 on the rankings.
This was due to Swiss star Roger Federer moving up three spots from No 7 to No 4 courtesy of winning his 100th ATP Tour title at the Dubai Championships.
Argentina's Juan Martin del Potro also moved down a spot to No 5, as did Japan's Kei Nishikori to No 7.
Anderson's next scheduled event is the Indian Wells Masters which begins in the Californian desert later this week.
There was more good news for South Africa's Lloyd Harris, who moved up seven spots to a career-high 92 in the rankings.
Harris played in the Oracle Challenger at Indian Wells this past weekend where he lost in the semi-finals Great Britain's Kyle Edmund.
Harris will play in the qualifier event for the Indian Wells Masters.
Top 20 in the latest ATP Tour rankings:
1. Novak Djokovic (SRB) 10 955
2. Rafael Nadal (ESP) 8 365
3. Alexander Zverev (GER) 6 595
4. Roger Federer (SUI) 4 600
5. Juan Martin Del Potro (ARG) 4 585
6. Kevin Anderson (RSA) 4 295
7. Kei Nishikori (JPN) 4 190
8. Dominic Thiem (AUT) 3 800
9. John Isner (USA) 3 405
10. Stefanos Tsitsipas (GRE) 3 175
11. Marin Cilic (CRO) 3 095
12. Borna Coric (CRO) 2 695
13. Karen Khachanov (RUS) 2 675
14. Milos Raonic (CAN) 2 275
15. Daniil Medvedev (RUS) 2 230
16. Marco Cecchinato (ITA) 2 091
17. Fabio Fognini (ITA) 1 885
18. Nikoloz Basilashvili (GEO) 1 865
19. Gael Monfils (FRA) 1 740
20. Pablo Carreno Busta (ESP) 1 705
Lloyd Harris has lost his semi-final match at the Oracle Challenger event in Indian Wells. Lloyd lost a tight last four clash to number one seed, Kyle Edmund (Great Britain) 2-6, 6-4, 1-6. Edmund is currently ranked 27th in the ATP singles rankings. pic.twitter.com/Jb8pKCDrq3
— Tennis South Africa (@TennisSA) March 3, 2019