[9] London Irish 15-38 Harlequins [7] 2020-07-16 08:45
Stadium: London Round: 19
Referee: Matthew Carley Home Manager: Declan Kidney Away Manager: Paul Gustard
Head to Head
| Prem Rugby | 2020/02/15 15:00 | Harlequins v London Irish | W | 15-29 |
| Premier Rugby Cup | 2019/09/28 14:00 | London Irish v Harlequins | L | 18-21 |
| Prem Rugby | 2018/04/07 14:00 | Harlequins v London Irish | W | 5-35 |
| Prem Rugby | 2017/09/02 15:45 | London Irish v Harlequins | W | 39-29 |
| Prem Rugby | 2016/05/01 14:00 | London Irish v Harlequins | L | 25-32 |
| European Rugby Challenge Cup | 2016/04/09 19:05 | Harlequins v London Irish | L | 38-30 |
| Prem Rugby | 2015/12/05 15:00 | Harlequins v London Irish | L | 38-7 |
| Prem Rugby | 2015/03/07 15:00 | Harlequins v London Irish | L | 26-20 |
Home History
| Prem Rugby | 2020/03/06 20:00 | Sale Sharks v London Irish | L | 39-0 |
| Prem Rugby | 2020/03/01 14:30 | London Irish v Wasps | L | 26-36 |
| Prem Rugby | 2020/02/22 15:00 | London Irish v Gloucester | W | 24-20 |
| Prem Rugby | 2020/02/15 15:00 | Harlequins v London Irish | W | 15-29 |
| Prem Rugby | 2020/01/24 19:45 | Northampton v London Irish | W | 16-20 |
| European Rugby Challenge Cup | 2020/01/18 20:00 | London Irish v Scarlets | L | 14-33 |
| European Rugby Challenge Cup | 2020/01/11 16:00 | Bayonne v London Irish | L | 27-10 |
| Prem Rugby | 2020/01/05 14:30 | London Irish v Exeter Chiefs | L | 28-45 |
Away History
| Prem Rugby | 2020/03/08 13:00 | Bristol v Harlequins | L | 28-15 |
| Prem Rugby | 2020/02/29 15:00 | Harlequins v Exeter Chiefs | W | 34-30 |
| Prem Rugby | 2020/02/22 15:00 | Bath v Harlequins | L | 19-12 |
| Prem Rugby | 2020/02/15 15:00 | Harlequins v London Irish | L | 15-29 |
| Premier Rugby Cup | 2020/02/02 13:00 | Exeter Chiefs v Harlequins | W | 22-49 |
| Prem Rugby | 2020/01/26 15:00 | Harlequins v Saracens | W | 41-14 |
| Premiership Rugby Shield | 2020/01/20 19:30 | Harlequins v Bath United | W | 33-26 |
| European Rugby Champions Cup | 2020/01/18 15:15 | Harlequins v Clermont | L | 19-26 |