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Saracens 15-21 London Irish: London Irish fly-half Mark Mapletoft makes a run but his boot decides the contest

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Mapletoft kicks four penalties in the first half and three more in the second to secure a semi-final place for London Irish

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Gloucester 21-0 Bristol: Andy Gomarsall is tackled by Bristol's Ollie Hodge as the home side meet some early resistance

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Scrum-half Gomarsall releases the ball from the scrum as Gloucester begin to wear down their West Country opponents

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Seti Kiole of Gloucester breaks a tackle, as tries from Gomarsall and Alex Brown seal a place in the semi-finals

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Northampton 19-24 Leeds: Tim Stimpson of Leeds tackles Northampton's Marc Stcherbina in a fiery encounter

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Northampton's Bruce Reihana makes a break with the ball but it's Leeds who create more chances throughout the match

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Leeds' Tim Stimpson surges forward as Northampton struggle to cope after the sending-off of scrum-half Mark Robinson