Stadium: Stadium Court Round: 25 Ground: Hardcourt indoor
| ATP Memphis | 2017/02/19 01:30 | Harrison, Ryan v Young, Donald | 6-4,6-4 |
| Others | 2016/10/02 05:00 | Young, Donald v Harrison, Ryan | 7-5,1-6,4-6 |
| ATP - Houston | 2014/04/08 18:40 | Harrison, Ryan v Young, Donald | 0-6,1-6 |
| Open d'Australie | 2018/01/19 09:00 | Harrison, Ryan v Marin Cilic | 6-7,3-6,6-7 |
| Open d'Australie | 2018/01/17 04:15 | Cuevas, Pablo v Harrison, Ryan | 4-6,6-7,4-6 |
| Open d'Australie | 2018/01/15 00:00 | Sela, Dudi v Harrison, Ryan | 3-6,7-5,6-3,5-7,2-6 |
| ATP Brisbane | 2018/01/07 09:00 | Kyrgios, Nick v Harrison, Ryan | 6-4,6-2 |
| ATP Brisbane | 2018/01/06 03:20 | Alex De Minaur v Harrison, Ryan | 6-4,6-7,4-6 |
| ATP Brisbane | 2018/01/04 05:15 | Harrison, Ryan v Yannick Hanfmann | 6-7,6-4,6-2 |
| ATP Brisbane | 2018/01/01 01:00 | Harrison, Ryan v Mayer, Leonardo | 6-4,3-6,6-2 |
| Paris, France | 2017/10/30 10:00 | Harrison, Ryan v Gojowczyk, Peter | 6-7,3-6 |
| Open d'Australie | 2018/01/16 04:00 | Novak Djokovic v Young, Donald | 6-1,6-2,6-4 |
| ATP - Auckland | 2018/01/07 23:30 | Young, Donald v Joao Sousa | 7-6,4-6,2-6 |
| Basel, Switzerland | 2017/10/25 15:35 | Young, Donald v Benneteau, Julien | 4-6,2-6 |
| ATP Shanghai Qual | 2017/10/08 05:45 | Young, Donald v Dusan Lajovic | 3-6,2-6 |
| ATP Shanghai Qual | 2017/10/07 05:40 | Young, Donald v Polansky, Peter | 6-1,6-4 |
| ATP Tokyo | 2017/10/03 05:00 | Diego Schwartzman v Young, Donald | 6-2,7-5 |
| ATP Shenzhen | 2017/09/29 09:55 | Young, Donald v David Goffin | 2-6,3-6 |
| ATP Shenzhen | 2017/09/27 12:55 | Young, Donald v Chardy, Jérémy | 7-6,6-4 |