[9] Harlequins 5-35 London Irish [12] 2018-04-07 14:00
Estádio: Twickenham Stoop Round: 19
Juiz: Ian Tempest Home Manager: Mark Mapletoft Away Manager: Nick Kennedy
Head to Head
| Premiership Rugby | 2017/09/02 15:45 | London Irish v Harlequins | L | 39-29 |
| Premiership Rugby | 2016/05/01 14:00 | London Irish v Harlequins | W | 25-32 |
| European Challenge Cup | 2016/04/09 19:05 | Harlequins v London Irish | W | 38-30 |
| Premiership Rugby | 2015/12/05 15:00 | Harlequins v London Irish | W | 38-7 |
| Premiership Rugby | 2015/03/07 15:00 | Harlequins v London Irish | W | 26-20 |
| Premiership Rugby | 2014/09/06 15:30 | London Irish v Harlequins | W | 15-20 |
Home History
| Aviva A League | 2018/03/26 18:30 | Bath United v Harlequins | W | 19-28 |
| Premiership Rugby | 2018/03/24 15:00 | Saracens v Harlequins | L | 24-11 |
| Aviva A League | 2018/03/19 13:00 | Harlequins v Saracens Storm | W | 20-0 |
| Premiership Rugby | 2018/03/04 15:00 | Harlequins v Bath | W | 20-5 |
| Premiership Rugby | 2018/02/24 14:30 | Harlequins v Newcastle Falcons | L | 10-28 |
| Premiership Rugby | 2018/02/17 15:00 | Leicester v Harlequins | L | 33-18 |
| Premiership Rugby | 2018/02/11 13:00 | Harlequins v Wasps | L | 22-44 |
| LV Cup | 2018/02/02 19:45 | Northampton v Harlequins | L | 36-10 |
Away History
| Premiership Rugby | 2018/03/24 15:00 | London Irish v Gloucester | L | 29-33 |
| Premiership Rugby | 2018/03/04 15:00 | Wasps v London Irish | L | 24-16 |
| Premiership Rugby | 2018/02/25 13:00 | London Irish v Worcester Warriors | W | 22-9 |
| Premiership Rugby | 2018/02/17 15:00 | Northampton v London Irish | L | 25-17 |
| Premiership Rugby | 2018/02/10 15:00 | London Irish v Sale Sharks | L | 9-13 |
| LV Cup | 2018/02/02 19:45 | Cardiff Blues v London Irish | W | 21-42 |
| LV Cup | 2018/01/27 15:00 | London Irish v Wasps | W | 66-7 |
| European Challenge Cup | 2018/01/20 13:00 | Krasny Yar v London Irish | W | 17-24 |