WTA and ATP rankings on - 27.12.2021
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- Ranking - singles
- Ranking - doubles
- Race - singles
| Rank | Move | Player name | Country | Points |
| 131. | - |
Tsitsipas Stefanos | Greece | 800 |
| 218. | - |
Tsitsipas Petros | Greece | 388 |
| 303. | - |
Kalovelonis Markos | Greece | 221 |
| 313. | - |
Pervolarakis Michail | Greece | 214 |
| 894. | 1 |
Thanos Aristotelis | Greece | 35 |
| 1089. | 8 |
Skorilas Alexandros | Greece | 24 |
| 1373. | 56 |
Sakellaridis Stefanos | Greece | 13 |
| 1497. | 61 |
Sakellaridis Michalis | Greece | 10 |
| 1593. | 3 |
Xilas Ioannis | Greece | 8 |
| 1761. | 2 |
Kountourakis Ioannis | Greece | 6 |
| 1875. | 3 |
Theodorou Eleftherios | Greece | 4 |
| 1875. | 3 |
Tsitsipas Pavlos | Greece | 4 |
| 2174. | 8 |
Stergiou Ioannis | Greece | 3 |
| 2288. | 9 |
Sakellaridis Dimitris | Greece | 2 |
| 2502. | 9 |
Schinas Stephanos | Greece | 2 |
|1-50|
- Betting ranking
| Rezai Aravane | +1590 |
| Laboutkova Aneta | +1374 |
| Gomez Federico Agustin | +1364 |
| Machac Tomas | +1345 |
| Blokhina Alexis | +1313 |
| Krutykh Oleksii | -1559 |
| Fruhvirtova Linda | -1447 |
| Lanca Sara | -1445 |
| Dancu Vlad Andrei | -1440 |
| Ilkel Cem | -1433 |
This week's tournaments
| Lower level tournaments | ||||
| Temuco challenger | 25 | |||
| Maia challenger | 25 | |||
| Yokkaichi challenger | 20 | |||
| Manzanillo challenger | 24 | |||
| UTR Pro Tennis Series 3 | 2 | |||
| UTR Pro Tennis Series 6 | 4 | |||
| Buenos Aires WTA | 16 | |||
| Carrara ITF | 24 | |||
| Trnava 8 ITF | 15 | |||
| Selva Gardena ITF | 19 | |||
| Yokohama ITF | 26 | |||
| Lousada 2 ITF | 8 | |||
| Santo Domingo 10 ITF | 21 | |||
| Antalya 35 ITF | 15 | |||
| Monastir 12 ITF | 16 | |||
| Ribeirao Preto ITF | 18 | |||
| Sharm El Sheikh 22 ITF | 16 | |||
| UTR Pro Tennis Series 6 | 2 | |||
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