| 2019 Yokkaichi Challenger | |
|---|---|
| Date | 5–11 August |
| Edition | 1st |
| Location | Yokkaichi, Japan |
| Champions | |
| Singles | |
 Yūichi Sugita | |
| Doubles | |
 Nam Ji-sung / Song Min-kyu | |
The 2019 Yokkaichi Challenger was a professional tennis tournament played on hard courts. It was the 1st edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Yokkaichi, Japan between 5 and 11 August 2019.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| JPN | Yasutaka Uchiyama | 139 | 1 |
 AUS | James Duckworth | 141 | 2 |
| JPN | Tatsuma Ito | 154 | 3 |
| KOR | Chung Hyeon | 166 | 4 |
| JPN | Yūichi Sugita | 197 | 5 |
 CHN | Zhang Ze | 215 | 6 |
| JPN | Hiroki Moriya | 216 | 7 |
| KOR | Chung Yun-seong | 237 | 8 |
 IND | Saketh Myneni | 264 | 9 |
 TPE | Wu Tung-lin | 282 | 10 |
| KOR | Nam Ji-sung | 292 | 11 |
| TPE | Yang Tsung-hua | 300 | 12 |
| JPN | Makoto Ochi | 378 | 13 |
| JPN | Yusuke Takahashi | 389 | 14 |
| JPN | Renta Tokuda | 397 | 15 |
 VIE | Lý Hoàng Nam | 400 | 16 |
The following players received wildcards into the singles main draw:
Yasunori Hashikawa Shinji Hazawa Yuya ItoThe following players received entry into the singles main draw as alternates:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Benjamin Lock Yuki Mochizuki Sho Shimabukuro Kento Takeuchi Jumpei Yamasaki Yūichi Sugita def. James Duckworth 3–6, 6–3, 7–6(7–1). Nam Ji-sung / Song Min-kyu def. Gong Maoxin / Zhang Ze 6–3, 3–6, [14–12].The 2017 Las Vegas Challenger was a professional tennis tournament played on hard courts. It was the third edition of the revamped tournament which was the part of the 2017 ATP Challenger Tour. It took place in Las Vegas, United States between 16 and 22 October 2017.
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