Stadium: Court 1 Round: 25 Ground: Grass
| Challenger Zhuhai | 2016/03/08 04:30 | Ramkumar Ramanathan v Jordan Thompson | 6-7,5-7 |
| ATP Indian Wells Qual | 2018/03/07 20:30 | Yuki Bhambri v Ramkumar Ramanathan | 6-4,6-2 |
| ATP Indian Wells Qual | 2018/03/07 01:15 | Michael Mmoh v Ramkumar Ramanathan | 3-6,5-7 |
| ATP Acapulco Qual | 2018/02/24 22:00 | Kevin King v Ramkumar Ramanathan | 6-3,6-0 |
| ATP Delray Beach | 2018/02/19 20:55 | Ramkumar Ramanathan v Donald Young | 1-6,2-6 |
| ATP Delray Beach Qual | 2018/02/18 17:50 | Bjorn Fratangelo v Ramkumar Ramanathan | 3-6,3-6 |
| ATP Delray Beach Qual | 2018/02/17 18:50 | Stefan Kozlov v Ramkumar Ramanathan | 3-6,2-6 |
| ATP New York Qual | 2018/02/11 18:30 | Ramkumar Ramanathan v Ernesto Escobedo | 5-7,3-6 |
| Australian Open Qual | 2018/01/14 02:45 | Vasek Pospisil v Ramkumar Ramanathan | 6-4,4-6,6-4 |
| Challenger Shenzhen | 2018/03/14 02:30 | Hiroki Moriya v Jordan Thompson | 4-6,6-2,6-3 |
| Challenger Zhuhai | 2018/03/06 02:00 | Jordan Thompson v Miomir Kecmanovic | 4-6,2-6 |
| Challenger Yokohama | 2018/03/03 02:00 | Jordan Thompson v Yasutaka Uchiyama | 4-6,5-7 |
| Challenger Yokohama | 2018/03/02 03:45 | Jordan Thompson v Stephane Robert | 6-3,4-6,6-2 |
| Challenger Yokohama | 2018/03/01 03:35 | Jordan Thompson v Hiroyasu Ehara | 6-4,6-2 |
| Challenger Yokohama | 2018/02/27 04:25 | Jordan Thompson v Prajnesh Gunneswaran | 2-6,6-4,6-3 |
| Challenger Kyoto | 2018/02/25 03:30 | John Millman v Jordan Thompson | 7-5,6-1 |
| Challenger Kyoto | 2018/02/24 02:30 | Tim Puetz v Jordan Thompson | 6-3,5-7,4-6 |