Two of international rugby’s biggest stars, All Black Richie McCaw and Wallaby Quade Cooper, have developed a nasty habit of getting into altercations with each other. During the Tri Nations rugby finale in August 27 2011 Quade Cooper hit Richie McCaw's head with his knee. It was a 54th-minute knee to the head that earned the Australian playmaker a date with the judiciary. Replays show Cooper looking down to check who was at the bottom of the ruck before kneeing McCaw in the head as he rose from the ground. It looked cynical and callous.