ATP. European Open, Qualification |
17-10-2021 |
| 18:10 | 3.12 Bernabe Zapata Miralles | 1.29 Norbert Gombos | | + 13 13 |
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WTA. BNP Paribas Open |
17-10-2021 |
| 22:00 | 2.08 Paula Badosa | 1.72 Victoria Azarenka | | + 42 42 |
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Challenger. Santiago 3 (mens) |
17-10-2021 |
| 22:00 | 1.24 Sebastian Baez | 3.48 Felipe Meligeni Alves | | + 14 14 |
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ATP. BNP Paribas Open |
18-10-2021 |
| 01:00 | 1.55 Cameron Norrie | 2.38 Nikoloz Basilashvili | | + 40 40 |
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WTA. VTB Kremlin Cup |
18-10-2021 |
| 09:00 | 1.21 Jelena Ostapenko | 3.88 Andrea Petkovic | | + 26 26 |
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| 09:00 | 1.83 Elena Rybakina | 1.86 Marketa Vondrousova | | + 23 23 |
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| 09:00 | 1.59 Liudmila Samsonova | 2.24 Ajla Tomljanovic | | + 27 27 |
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| 09:00 | 1.25 Daria Kasatkina | 3.58 Anhelina Kalinina | | + 26 26 |
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| 09:00 | 3.18 Ekaterina Alexandrova | 1.31 Ons Jabeur | | + 26 26 |
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ATP. VTB Kremlin Cup |
18-10-2021 |
| 09:00 | 1.71 Raven Klaasen/Ben McLachlan | 2 Rohan Bopanna/Aisam-Ul-Haq Qureshi | | + 7 7 |
| | | |
| 09:00 | 1.38 Tomislav Brkic/Nikola Cacic | 2.7 Alexander Bublik/Adrian Mannarino | | + 4 4 |
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| 09:00 | 1.91 Marcus Daniell/Marcelo Demoliner | 1.73 Ariel Behar/Gonzalo Escobar | | + 9 9 |
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| 09:00 | 1.77 Santiago Gonzalez/Andres Molteni | 1.86 Andrey Golubev/Hugo Nys | | + 4 4 |
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| 09:00 | 1.45 Laslo Djere | 2.6 Gilles Simon | | + 22 22 |
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| 09:00 | 1.3 Mackenzie McDonald | 3.22 Yoshihito Nishioka | | + 21 21 |
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| 09:00 | 4.82 Evgeny Donskoy | 1.15 Ilya Ivashka | | + 20 20 |
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| 09:00 | 1.35 Federico Coria | 2.98 Alibek Kachmazov | | + 19 19 |
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| 09:00 | 1.53 Tommy Paul | 2.36 Mikael Ymer | | + 21 21 |
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| 09:00 | 1.75 Roman Safiullin | 1.94 Adrian Mannarino | | + 21 21 |
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| 09:00 | 2.42 Guido Pella | 1.51 Pedro Martinez | | + 18 18 |
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| 09:00 | 2.15 John Millman | 1.63 Benjamin Bonzi | | + 21 21 |
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| 09:00 | 4.1 Pavel Kotov/Roman Safiullin | 1.18 Dominic Inglot/Ken Skupski | | + 3 3 |
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| 09:00 | 1.59 Karen Khachanov/Andrey Rublev | 2.27 Luke Saville/John-Patrick Smith | | + 7 7 |
| | | |
| 09:00 | 2.32 Laslo Djere/Guido Pella | 1.52 Ilya Ivashka/Pedro Martinez | | + 2 2 |
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WTA. Tenerife Ladies Open |
18-10-2021 |
| 11:00 | 5.32 Heather Watson | 1.12 Clara Tauson | | + 25 25 |
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| 11:00 | 1.14 Alison van Uytvanck | 4.8 Danka Kovinic | | + 25 25 |
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| 11:00 | 2.01 Arantxa Rus | 1.74 Viktorija Golubic | | + 25 25 |
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| 11:00 | 1.69 Marta Kostyuk | 2.07 Irina-Camelia Begu | | + 25 25 |
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| 11:00 | 1.04 Elina Svitolina | 7.95 Maria Osorio | | + 23 23 |
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| 11:00 | 3.7 Varvara Gracheva | 1.23 Sara Sorribes Tormo | | + 25 25 |
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| 11:00 | 3.06 Lucrezia Stefanini | 1.33 Mayar Sherif | | + 25 25 |
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| 11:00 | 1.39 Saisai Zheng | 2.78 Rebeka Masarova | | + 26 26 |
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| 11:00 | 2.05 Nuria Parrizas Diaz | 1.71 Ann Li | | + 25 25 |
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Challenger. Losinj (mens) |
18-10-2021 |
| 12:00 | 1.01 Aldin Setkic | 8.75 Anthony Genov | | + 2 2 |
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| 12:00 | 1.05 Jonas Forejtek | 6.45 Victor Vlad Cornea | | + 8 8 |
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| 13:00 | 2.88 Danilo Petrovic | 1.34 Mathias Bourgue | | + 8 8 |
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| 13:30 | 2.02 Manuel Guinard | 1.66 Nino Serdarusic | | + 8 8 |
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| 13:30 | 2.11 Carlos Gimeno Valero | 1.62 Nikola Milojevic | | + 5 5 |
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Challenger. Bogota (mens) |
18-10-2021 |
| 17:00 | 2.5 Orlando Luz | 1.43 Gerald Melzer | | + 7 7 |
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| 17:00 | 2.8 Alexis Gautier | 1.34 Matheus Pucinelli de Almeida | | + 9 9 |
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| 17:00 | 1.72 Nicolas Mejia | 1.89 Cristian Rodriguez | | + 9 9 |
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| 17:00 | 2.03 Matias Zukas | 1.67 Roberto Quiroz | | + 7 7 |
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| 17:00 | 3.62 Alejandro Gonzalez | 1.21 Vit Kopriva | | + 8 8 |
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| 17:00 | 3.02 Dalibor Svrcina | 1.3 Daniel Altmaier | | + 10 10 |
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| 17:00 | 1.08 Daniel Galan | 5.5 Mathieu Perchicot | | + 8 8 |
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| 17:00 | 1.85 Lucas Catarina | 1.75 Malek Jaziri | | + 8 8 |
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| 17:00 | 1.53 Jesper de Jong | 2.26 Pol Martin | | + 10 10 |
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| 17:00 | 1.03 Alexis Galarneau | 7.35 Enrique Pena | | + 7 7 |
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Challenger. Buenos Aires (mens) |
18-10-2021 |
| 17:00 | 1.11 Thiago Monteiro | 4.94 Hernan Casanova | | + 9 9 |
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| 17:00 | 1.46 Santiago Fa Rodriguez Taverna | 2.43 Roman Andres Burruchaga | | + 9 9 |
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