Stadium: Stadium Court Round: 26 Ground: Hardcourt outdoor
| ATP Atlanta | 2018/07/24 16:30 | Ryan Harrison v James Duckworth | 4-6,7-6,6-1 |
| Wimbledon | 2018/07/04 12:25 | Adrian Mannarino v Ryan Harrison | 7-5,7-5,7-6 |
| Wimbledon | 2018/07/02 16:00 | Ryan Harrison v Roberto Carballes Baena | 6-1,6-4,6-2 |
| ATP Eastbourne | 2018/06/25 12:40 | Jay Clarke v Ryan Harrison | 6-4,6-1 |
| ATP Queens | 2018/06/19 17:45 | Ryan Harrison v Kyle Edmund | 6-7,4-6 |
| French Open | 2018/05/29 09:00 | Ryan Harrison v Maximilian Marterer | 1-6,3-6,5-7 |
| ATP Geneva | 2018/05/21 16:00 | Frances Tiafoe v Ryan Harrison | 3-6,7-6,6-4 |
| ATP Rome | 2018/05/15 20:25 | Ryan Harrison v Marin Cilic | 7-6,1-6,6-7 |
| ATP Atlanta | 2018/07/23 19:40 | Lukas Lacko v Prajnesh Gunneswaran | 6-2,6-2 |
| Wimbledon | 2018/07/04 13:30 | Roger Federer v Lukas Lacko | 6-4,6-4,6-1 |
| Wimbledon | 2018/07/02 17:00 | Lukas Lacko v Benjamin Bonzi | 4-6,6-3,7-6,6-4 |
| ATP Eastbourne | 2018/06/30 14:00 | Lukas Lacko v Mischa Zverev | 4-6,4-6 |
| ATP Eastbourne | 2018/06/29 14:50 | Lukas Lacko v Marco Cecchinato | 6-3,6-4 |
| ATP Eastbourne | 2018/06/28 10:00 | Lukas Lacko v Cameron Norrie | 6-3,6-4 |
| ATP Eastbourne | 2018/06/27 11:15 | Diego Schwartzman v Lukas Lacko | 6-4,4-6,5-7 |
| ATP Eastbourne | 2018/06/26 11:20 | Roberto Quiroz v Lukas Lacko | 4-6,6-7 |