WATCH: Willie Le Roux inexplicably drops the ball with the line at his mercy

This is why you don't swan dive!

This will haunt him for the rest of his days. It has been a ridiculously open game in the first 40 minutes of Leinster's Champions Cup quarter-final clash against Wasps at the Aviva Stadium. Leinster scored the game's first try through Isa Nacewa in the corner after a beautiful pass from young, Joey Carbery. Leinster have definitely been the better side and perhaps it could be argued that they should be further ahead when you consider the possession and territorial advantage which they have had. Those were the statistics after 33 minutes but Jack Conan went over for another try which Johnny Sexton converted which brought the scroeline to 15-3 in the home side's favour. It then truly reflected Leinster dominance. The half-time score could have looked so much difference though when Willie Le Roux was put clean through. The South-African had the line at this mercy and decided to perform a swan dive, such was his excitement at getting Wasps back in the game. Or so he thought. The 27-year-old dropped the ball just before touching down and you can only imagine the utter embarrassment which he must have felt. https://twitter.com/Sean_McMahon89/status/848185534421848064 Just before half-time, Robbie Henshaw went over for the third try of the game after a Sexton offload. Sexton converted and it's 22-3 at half-time. Leinster look like they are home dry.