Both too close to call, both simarly ranked teams, only one team has never made it to a semi final from the bunch though...
Can an ascendant Wales squeek past a well firing Argentina who have perhaps failed to spark this tournament
Can a 17 match unbeaten run Ireland get the monkey off their backs and make it through versus a 3 time world cup winning union?
Don't miss either!
ITV commentary making George Gregan look like a... very short person.