Ireland's major winners 18 holes away from the World Cup November 26, 2011 HAINAN, China (AP) -- Rory McIlroy and Graeme McDowell will head into the final round of the OMEGA Mission Hills World Cup with a two-stroke lead after a convincing performance for Ireland in the fourballs on Saturday. The Irish duo recorded eight birdies to finish the third round with an 8-under 64, and a 21-under total of 195 at the Mission Hills complex. However, the world No. 2 McIlroy and 2010 U.S. Open champion McDowell will not be able to rest easy Sunday with Germany, South Africa and the United States all tied for second at 197. Martin Kaymer and Alex Cekja made 11 birdies in their 11-under 61 on the Blackstone course carved out of cooled lava rock. That feat was matched by South Africans Charl Schwartzel and Louis Oosthuizen, who also managed a 61. The U.S. team of Gary Woodland and Matt Kuchar had 10 birdies and one bogey in a 9-under 63. Australia slipped to fifth place with a 198 as Brendan Jones and Richard Green on the wet and humid course had a 67. Edoardo and Francesco Molinari put defending-champion Italy back into contention with an 8-under 64 that left them tied for seventh with Mexico at 16 under. But Ian Poulter and Justin Rose of England saw their hopes of lifting the trophy slip with two bogeys in their 4-under 68. They have a share of 15th with Zimbabwe at 13 under. Zhang Xinjun and Liang Wenchong of China were at 12 under. Sunday's final round will see a return to the tricky foursomes alternate shot format. The World Cup features 28 teams and is being staged biennially following golf's inclusion in the Olympics for 2016.