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
| Baez Sebastian | +900 |
| Gea Arthur | +572 |
| Chidekh Clement | +546 |
| Kotliar Yelyzaveta | +529 |
| Jurna Elizabeth | +526 |
| Falck Reece | -438 |
| Penalver Aguilo Maria | -380 |
| Trush Yelizaveta | -362 |
| Trainauskas Justas | -350 |
| Harajda Ema | -350 |
This week's tournaments
| Main tournaments | ||||
| Australian Open | 33 | |||
| Australian Open | 33 | |||
| Lower level tournaments | ||||
| Oeiras 5 challenger | 10 | |||
| Itajai challenger | 10 | |||
| Soma Bay challenger | 10 | |||
| Phan Thiet challenger | 4 | |||
| UTR Pro Tennis Series 3 | 62 | |||
| UTR Pro Tennis Series 5 | 32 | |||
| UTR Pro Tennis Series 9 | 4 | |||
| Leszno ITF | 12 | |||
| Manama ITF | 8 | |||
| Monastir 19 ITF | 24 | |||
| Buenos Aires 2 ITF | 12 | |||
| Petit Bourge ITF | 12 | |||
| Weston ITF | 12 | |||
| UTR Pro Tennis Series 5 | 36 | |||
| UTR Pro Tennis Series 9 | 24 | |||
| Antalya 3 ITF | 13 | |||
| UTR Pro Match Series | 28 | |||
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