Harlequins stay top of Pool 2 despite this narrow defeat but have Leinster for company now after this thrilling battle in a freezing Dublin. Mike Brown and Danny Care inspired a stirring second-half fightback from Quins, who came from 11-3 down to lead 13-11 with little over 10 minutes to play. An Ian Madigan penalty proved decisive in the end, with the match marred by a late punch-up and a somewhat strange yellow card for Charlie Matthews, for bringing his hand close to the eyes of Dominic Ryan during the scuffle, despite officials saying they were not sure he was eye-gouging.
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Ian Madigan kicks three crucial penalties for Leinster
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Isaac Boss score the home side's only try
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Mike Brown replied with a try for Harlequins
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Quins remain top of Pool Two ahead of Leinster on points differnce
Leinster survived a 25-metre scrum in the 70th minute and broke quickly forward, the attack ending with Harlequins going offside and a penalty scored by Madigan to nose @placeholder back ahead.