| Harlequins | London Irish | |
|---|---|---|
| Games played | 45 | |
| Draws | 4 | |
| Wins (Home / Away) | 24 - (13 / 11) | 17 - (8 / 9) |
| Win Percentage | 53% | 38% |
| Biggest Winning Margin | 31 | 30 |
Premiership - 29 Oct 2022
Premiership - 03 Apr 2022
Premiership - 27 Nov 2021
Premiership - 24 Apr 2021
Premiership - 10 Jan 2021
Premiership - 09 Sep 2020
Premiership - 15 Feb 2020
Premiership - 07 Apr 2018
Premiership - 02 Sep 2017
Premiership - 01 May 2016
Challenge Cup - 09 Apr 2016
Premiership - 05 Dec 2015
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Premiership - 06 Sep 2014
Premiership - 29 Mar 2014
Premiership - 05 Oct 2013
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Premiership - 11 Feb 2012
Anglo-Welsh Cup - 15 Oct 2011
Premiership - 03 Sep 2011
Premiership - 26 Feb 2011
Premiership - 27 Dec 2010
Premiership - 28 Feb 2010
Anglo-Welsh Cup - 31 Jan 2010
Premiership - 31 Oct 2009
Premiership - 09 May 2009
Premiership - 14 Feb 2009
Anglo-Welsh Cup - 25 Oct 2008
Premiership - 27 Sep 2008
Premiership - 19 Apr 2008
Anglo-Welsh Cup - 28 Oct 2007
Premiership - 15 Sep 2007
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Premiership - 02 Sep 2006
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Premiership - 04 Apr 2004
Premiership - 27 Sep 2003
Premiership - 16 Mar 2003
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Premiership - 14 Apr 2002
Premiership - 01 Sep 2001
Premiership - 19 Nov 2000
Premiership - 19 Aug 2000