WTA and ATP rankings on - 27.12.2021
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- Ranking - singles
- Ranking - doubles
- Race - singles
| Rank | Move | Player name | Country | Points |
| 4. | - |
Tsitsipas Stefanos | Greece | 6540 |
| 399. | 1 |
Pervolarakis Michail | Greece | 106 |
| 771. | 7 |
Tsitsipas Petros | Greece | 27 |
| 855. | 4 |
Kalovelonis Markos | Greece | 19 |
| 1076. | 2 |
Thanos Aristotelis | Greece | 10 |
| 1199. | - |
Skorilas Alexandros | Greece | 7 |
| 1373. | 3 |
Sakellaridis Stefanos | Greece | 4 |
| 1571. | 2 |
Azoides Demetris | Greece | 2 |
| 2062. | 10 |
Stergiou Ioannis | Greece | 1 |
| 2118. | 10 |
Kapiris Stamatis | Greece | 1 |
| 2118. | 10 |
Keisidis Christos | Greece | 1 |
| 2118. | 10 |
Stamoulos Ioannis | Greece | 1 |
| 2153. | 8 |
Xilas Ioannis | Greece | 1 |
| 2206. | 9 |
Sakellaridis Michalis | Greece | 1 |
|1-50|
- Betting ranking
| Branstine Carson | +1222 |
| Popko Dmitry | +927 |
| Bouzas Maneiro Jessica | +899 |
| Trungelliti Marco | +882 |
| Shibahara Ena | +869 |
| Krutykh Oleksii | -962 |
| Bonzi Benjamin | -863 |
| Kolodynska Jana | -822 |
| Added Dan | -817 |
| Barroso Campos Alberto | -791 |
This week's tournaments
| Main tournaments | ||||
| Madrid | 19 | |||
| Madrid WTA | 19 | |||
| Lower level tournaments | ||||
| Guangzhou challenger | 22 | |||
| Savannah challenger | 2 | |||
| Shenzhen 3 challenger | 1 | |||
| Rome 2 challenger | 1 | |||
| Concepcion challenger | 2 | |||
| UTR Pro Tennis Series 8 | 3 | |||
| Saint-Malo WTA | 6 | |||
| Oeiras 3 ITF | 5 | |||
| Tokyo 6 ITF | 2 | |||
| Charlottesville ITF | 3 | |||
| Lopota 2 ITF | 12 | |||
| Wuning ITF | 1 | |||
| Hammamet 6 ITF | 1 | |||
| Mosquera ITF | 1 | |||
| Nottingham 6 ITF | 1 | |||
| Santa Margherita Di Pula 5 ITF | 1 | |||
| Antalya 16 ITF | 1 | |||
| Kursumlijska Banja 2 ITF | 1 | |||
| Monastir 33 ITF | 1 | |||
| Shymkent 2 ITF | 1 | |||
| Telde 4 ITF | 1 | |||
| UTR Pro Match Series | 6 | |||
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