Stadium: Stadium Court Round: 26 Ground: Hardcourt indoor
| ATP New York | 2018/02/13 00:30 | Ryan Harrison v Donald Young | 6-3,7-6 |
| Australian Open | 2018/01/19 09:00 | Ryan Harrison v Marin Cilic | 6-7,3-6,6-7 |
| Australian Open | 2018/01/17 04:15 | Pablo Cuevas v Ryan Harrison | 4-6,6-7,4-6 |
| Australian Open | 2018/01/15 00:00 | Dudi Sela v Ryan Harrison | 3-6,7-5,6-3,5-7,2-6 |
| ATP Brisbane | 2018/01/07 09:00 | Nick Kyrgios v Ryan Harrison | 6-4,6-2 |
| ATP Brisbane | 2018/01/06 03:20 | Alex De Minaur v Ryan Harrison | 6-4,6-7,4-6 |
| ATP Brisbane | 2018/01/04 05:15 | Ryan Harrison v Yannick Hanfmann | 6-7,6-4,6-2 |
| ATP Brisbane | 2018/01/01 01:00 | Ryan Harrison v Leonardo Mayer | 6-4,3-6,6-2 |
| ATP New York | 2018/02/12 22:25 | Jared Donaldson v Ivo Karlovic | 4-6,6-7 |
| ATP Quito | 2018/02/08 19:20 | Corentin Moutet v Ivo Karlovic | 7-5,6-7,7-6 |
| ATP Quito | 2018/02/07 17:00 | Ernesto Escobedo v Ivo Karlovic | 4-6,7-6,6-7 |
| Australian Open | 2018/01/19 04:50 | Andreas Seppi v Ivo Karlovic | 6-3,7-6,6-7,6-7,9-7 |
| Australian Open | 2018/01/17 02:20 | Ivo Karlovic v Yuichi Sugita | 7-6,6-7,7-5,4-6,12-10 |
| Australian Open | 2018/01/15 05:15 | Ivo Karlovic v Laslo Djere | 7-6,6-3,7-6 |
| ATP Antwerp | 2017/10/16 12:55 | Ivo Karlovic v Guido Pella | 3-6,7-5,7-6 |
| ATP Shanghai | 2017/10/09 05:00 | Feliciano Lopez v Ivo Karlovic | 7-6,7-6 |