and Australian Rugby) extended an official invitation to the Unión Argentina de Rugby (UAR), to join a new revised Four Nations tournament in 2012. This long-anticipated move was generally met with great approval from all parties involved. The invitation was however subject to certain conditions, like the guaranteed availability of the top Puma players, most of whom play highly paid professional club rugby in Europe at present. With Argentina's entry ultimately confirmed, the Tri Nations was renamed The Rugby Championship. The involvement of the Pumas caused the competition to revert to a pure home-and-away series. The Freedom Cup (against New Zealand) and the Mandela Challenge Plate (against Australia) are competed for as part of The Rugby Championship. Africa Cup The Africa Cup is an annual competition involving ten African nations. South Africa sent its top amateurs to this competition up until 2007. References Further reading Bath, Richard (ed.) The Complete Book of Rugby (Seven Oaks Ltd, 1997 ) Richards, Huw A Game for Hooligans: The History of Rugby Union (Mainstream Publishing, Edinburgh, 2007, ) External links SA Rugby Homepage South African rugby union news from Planet Rugby IRB pages for South Africa 100 years of South African rugby: Part one 100 years of South African rugby: Part two 100 years of South African rugby (part three) – IRB