Leinster will bid to reach a fourth Investec Champions Cup final in five seasons this afternoon.
Leo Cullen's team welcome Toulon to the Aviva Stadium, with a final in Bilbao against Bordeaux or Bath the prize for the winners.
The clubs have seven European Cups between them, with Leinster aiming to land an elusive fifth title this season.
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Harry Byrne has been preferred to Sam Prendergast at 10 for URC champions Leinster, while Andrew Porter is fit to start in the front-row.
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Ulster will have a chance to qualify for a maiden Challenge Cup final when they take on Exeter in Belfast this evening.
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The northern province have been boosted by the return to fitness of a host of key players, including Ireland flanker Nick Timoney.
