The 2018 ITTF Challenge Series was the second season of the International Table Tennis Federation's secondary professional table tennis tour, a level below the ITTF World Tour.[1]
Below is the schedule released by the ITTF:[2]
| Tour | Event | Location | Venue | Date | Prize money (USD) | Ref. | ||
|---|---|---|---|---|---|---|---|---|
| Start | Finish | |||||||
| 1 |  Polish Open | Spała | Spała Olympic Center | March 13 | March 17 | 40,000 | [3] | |
| 2 |  Spanish Open | Guadalajara | Palacio Multiusos de Guadalajara | March 28 | April 1 | 40,000 | [4] | |
| 3 | Slovenia Open | Otočec | Otočec Sports Centre | April 2 | April 6 | 40,000 | [5] | |
| 4 | Zagreb Open | Zagreb | Zagreb Hall of Sports | May 2 | May 6 | 40,000 | [6] | |
| 5 |  Thailand Open | Bangkok | Fashion Island - Island Hall | May 16 | May 20 | 40,000 | [7] | |
| 6 |  Pyongyang Open | Pyongyang | Pyongyang Table Tennis Hall | June 13 | June 17 | 40,000 | [8] | |
| 7 | Nigerian Open | Lagos | Sir Molade Okoya-Thomas Indoor Hall | August 8 | August 12 | 46,000 | [9] | |
| 8 |  Belgium Open | De Haan | Sport en Recreatiecentrum Haneveld | October 23 | October 27 | 40,000 | [10] | |
| 9 |  Belarus Open | Minsk | Palace of Tennis | November 13 | November 18 | 40,000 | [11] | |
| Event | Men's singles | Women's singles | Men's doubles | Women's doubles | U21 Men's singles | U21 Women's singles | |
|---|---|---|---|---|---|---|---|
| Polish Open |  Lim Jong-hoon | Yang Ha-eun | Jung Young-sik Lee Sang-su | Jeon Ji-hee Yang Ha-eun | Marek Badowski | Kim Ji-ho | |
| Spanish Open | Kim Min-hyeok |  Saki Shibata | An Jae-hyun Cho Seung-min | Honoka Hashimoto Hitomi Sato | Cho Seung-min | Saki Shibata | |
| Slovenia Open | Mizuki Oikawa | Miyu Kato | Marek Badowski Patryk Zatowka |  Ng Wing Nam Soo Wai Yam |  Bence Majoros | Saki Shibata | |
| Zagreb Open | Panagiotis Gionis | Saki Shibata | Adam Szudi Nandor Ecseki | Honoka Hashimoto Hitomi Sato | Anders Lind | Saki Shibata | |
| Thailand Open |  Xu Ruifeng | Liu Shiwen | Tobias Hippler Kilian Ort | Orawan Paranang Suthasini Sawettabut | Yuta Tanaka | Saki Shibata | |
| Pyongyang Open | Pak Sin-hyok | Kim Song-i | Ji Jiale Liu Yebo | Cha Hyo-sim Kim Nam-hae | Cao Wei | Guo Yuhan | |
| Nigerian Open | Quadri Aruna | Guo Yan |  Alexandre Robinot Joe Seyfried | Qi Fenjie Sun Chen | Wang Shaobo | Guo Yan | |
| Belgian Open | Park Gang-hyeon | Saki Shibata | An Jae-hyun Cho Seung-min | Satsuki Odo Saki Shibata | Shunsuke Togami | Kim You-jin | |
| Belarus Open | Zhao Zihao | Saki Shibata | Kakeru Sone Yuta Tanaka | Satsuki Odo Saki Shibata | Zhao Zihao | He Aige |