The first pair of World Cup semi finalists will be discovered this evening.
First up at four, the walking wounded of Wales face South Africa at Twickenham.
Over the course of the past month, Wales have lost of a number of key squad members through injuries.
But lock Alun Wyn Jones says the fact they're still in the tournament at this stage will give them huge confidence.
Today's other quarter final pits an allegedly mutinous French side against the defending champions, New Zealand.
Cardiff's Millennium Stadium is the venue for that one, where kick off is at 8.
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The Ireland squad will have their final session before tomorrow's meeting with Argentina.
Johnny Sexton will be hoping to step-up his involvement as he continues his recovery from a groin strain.
