Join our Four Nations Facebook page and follow the NRL on twitter for your chance to win four tickets to this Sunday’s Four Nations opener at Parramatta Stadium. <br><br> Don't miss this great opportunity to take three of your friends along to an international spectacular, with Samoa and Tonga playing a curtain-raiser at 1pm, before the Kangaroos take on Papua New Guinea at 4pm. <br><br> To win you need to join the Four Nations Facebook page by clicking <b><a href="http://www.facebook.com/fournations" target="_blank">here</a></b> or follow the NRl on twitter by clicking <b><a href="http://twitter.com/nrl" target="_blank">here</a></b> - and then become one of the first four people to answer any one of five questions correctly.