 | This article relies largely or entirely on a single source .(October 2023) |
| Singles | |
|---|---|
| 2023 Challenger Banque Nationale de Saguenay | |
| Champion |  Katherine Sebov |
| Runner-up |  Fanny Stollár |
| Score | 6–4, 6–4 |
Karman Thandi is the defending champion [1] but chose not to participate.
Last year runner-up Katherine Sebov won the title, defeating Fanny Stollár in the final, 6–4, 6–4.
Katherine Sebov (champion)
Arina Rodionova (semifinals)
Lesley Pattinama Kerkhove (first round)
Haruka Kaji (first round)
Lulu Sun (withdrew)
Justina Mikulskytė (quarterfinals) Marina Stakusic (second round) Fanny Stollár (final)| Semifinals | Final | ||||||||||||
| 1 | Katherine Sebov | 6 | 6 | ||||||||||
| WC | Isabelle Boulais | 1 | 0 | ||||||||||
| 1 | Katherine Sebov | 6 | 6 | ||||||||||
| 8 | Fanny Stollár | 4 | 4 | ||||||||||
| 8 | Fanny Stollár | 2 | 6 | 6 | |||||||||
| 2 | Arina Rodionova | 6 | 1 | 3 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | K Sebov | 7 | 6 | ||||||||||||||||||||||||
| Q |  N Sengphrachanh | 5 | 2 | 1 | K Sebov | 6 | 6 | ||||||||||||||||||||
| WC | R Verma | 1 | 4 | Q | S Nicholson | 4 | 3 | ||||||||||||||||||||
| Q | S Nicholson | 6 | 6 | 1 | K Sebov | 6 | 6 | ||||||||||||||||||||
| V Mboko | 6 | 77 | V Mboko | 2 | 4 | ||||||||||||||||||||||
 E Silva | 4 | 65 | V Mboko | 4 | 6 | 6 | |||||||||||||||||||||
| N Hanatani | 3 | 5 | 7 | M Stakusic | 6 | 4 | 3 | ||||||||||||||||||||
| 7 | M Stakusic | 6 | 7 | 1 | K Sebov | 6 | 6 | ||||||||||||||||||||
| 4 | H Kaji | 2 | 4 | WC | I Boulais | 1 | 0 | ||||||||||||||||||||
 D Hewitt | 6 | 6 | D Hewitt | 3 | 3 | ||||||||||||||||||||||
| M Sieg | 6 | 6 | M Sieg | 6 | 6 | ||||||||||||||||||||||
| LL |  J Jebawy | 2 | 2 | M Sieg | 3 | 67 | |||||||||||||||||||||
| Q | A Zhu | 4 | 2 | WC | I Boulais | 6 | 79 | ||||||||||||||||||||
| SB Grey | 6 | 6 | SB Grey | 6 | 4 | 62 | |||||||||||||||||||||
| WC | I Boulais | 6 | 6 | WC | I Boulais | 4 | 6 | 77 | |||||||||||||||||||
| Q | A Ulyashchenko | 3 | 2 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | F Stollár | 77 | 2 | 6 | |||||||||||||||||||||||
| Q | C Campana | 63 | 6 | 3 | 8 | F Stollár | 6 | 710 | |||||||||||||||||||
 U Radwańska | 6 | 4 | 7 | U Radwańska | 3 | 68 | |||||||||||||||||||||
| C Brace | 2 | 6 | 5 | 8 | F Stollár | 65 | 6 | 6 | |||||||||||||||||||
| Q | P Corley | 4 | 4 | R Anderson | 77 | 1 | 3 | ||||||||||||||||||||
 K Kozarov | 6 | 6 | K Kozarov | 3 | 710 | 0 | |||||||||||||||||||||
| R Anderson | 6 | 4 | 6 | R Anderson | 6 | 68 | 6 | ||||||||||||||||||||
| 3 | L Pattinama Kerkhove | 4 | 6 | 3 | 8 | F Stollár | 2 | 6 | 6 | ||||||||||||||||||
| 6 | J Mikulskytė | 6 | 6 | 2 | A Rodionova | 6 | 1 | 3 | |||||||||||||||||||
| WC | M Kupres | 3 | 2 | 6 | J Mikulskytė | 6 | 6 | ||||||||||||||||||||
| WC | N Lagaev | 6 | 6 | N Lagaev | 4 | 0 | |||||||||||||||||||||
| Q | L Kwong | 0 | 2 | 6 | J Mikulskytė | 1 | 4 | ||||||||||||||||||||
 C Romeo | 3 | 6 | 7 | 2 | A Rodionova | 6 | 6 | ||||||||||||||||||||
| Q | L Sleeth | 6 | 3 | 5 | C Romeo | 4 | 4 | ||||||||||||||||||||
 J Svendsen | 6 | 3 | 4 | 2 | A Rodionova | 6 | 6 | ||||||||||||||||||||
| 2 | A Rodionova | 1 | 6 | 6 | |||||||||||||||||||||||
Jeļena Ostapenko was the defending champion, but entered the Women's singles instead awarded as wild card and lost to Kristina Mladenovic in the second round.
Tami Grende and Ye Qiuyu were the defending champions, but chose not to participate.
Jennifer Brady was the defending champion, but she chose to compete in Sacramento instead.
Océane Dodin was the defending champion, but withdrew from her second round match due to dizziness.
Yaroslava Shvedova was the defending champion from 2015, when the event was last held, but did not participate this year due to injury.
Catherine Bellis was the defending champion but withdrew before the competition began.
Hsieh Su-wei and Oksana Kalashnikova were the defending champions, but Hsieh chose to compete in Dubai instead. Kalashnikova played alongside Natela Dzalamidze, but lost in the quarterfinals to Irina Bara and Mihaela Buzărnescu.
The 2018 Keio Challenger was a professional tennis tournament played on hard courts. It was the thirteenth (ATP) and second (ITF) editions of the tournament and part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Yokohama, Japan between 26 February and 4 March 2018 for the men's edition and between 5 and 11 March 2018 for the women's.
Kiki Bertens was the two-time defending champion, but lost in the quarterfinals to Kirsten Flipkens.
Anett Kontaveit was the defending champion, but lost in the first round to Veronika Kudermetova.
Kateryna Bondarenko was the defending champion, but chose not to participate.
Anastasia Pavlyuchenkova was the defending champion, but chose to compete in Linz instead.
This was the first edition of the tournament.
Georgina García Pérez and Fanny Stollár were the defending champions, but chose not to participate together. García Pérez played alongside Renata Voráčová, but lost in the quarterfinals to Anna Blinkova and Anastasia Potapova.
Roberta Vinci was the champion the last time the tournament was held in 2013, but she has since retired from professional tennis.
Han Xinyun and Darija Jurak were the defending champions but both players chose not to participate.
Anna Danilina and Ingrid Neel were the defending champions, having won the previous edition in 2019, but both players chose not to participate.
Andrea Sestini Hlaváčková and Lucie Hradecká were the defending champions having won the previous edition in 2013, but Hradecká chose to compete at the 2021 Prague Open instead, whilst Sestini Hlaváčková retired from professional tennis in 2019.
Mihaela Buzărnescu and Fanny Stollár were the defending champions, but only Stollár chose to defend her title, partnering Tímea Babos. Stollár lost in the semifinals to Katarzyna Piter and Kimberley Zimmermann.
Madison Brengle was the defending champion, but lost in the second round to Sofia Kenin.
 | This article needs additional or more specific categories .(October 2023) |