Curtis stays in front

Open champion Ben Curtis has extended his lead by a stroke after finishing the second round of the Taiheiyo Masters in Japan at 10 under par.

The 26-year-old American, who came from nowhere to claim the Claret Jug on his Open debut in July, is two shots ahead of a chasing quartet consisting of Azuma Yano, Tomohiro Kondo, Toshimitsu Izawa and Masashi Ozaki