 Complete the following phrase:  Despite rising playing standards and more media attention on rugby union, Italian teams competing in the Heineken Cup and European Challenge Cup have generally struggled to compete against the established club teams of the other Six Nations countries. In response both John Kirwan, the former Italian head coach, and David Pickering, the Welsh Rugby Union chairman, suggested that merged Italian teams should enter the Celtic League, now known as Pro14, and in March 2009 the Celtic Rugby Board and FIR announced an agreement in principle to add two Italian teams to the Magners League for 