By Andrew Both
SHANGHAI (Reuters) - Graeme McDowell continued to lead the way but his advantage was trimmed to one stroke after the third round at the $8.5 million WGC-HSBC Champions tournament on Saturday.
The Northern Irishman battled to a one-under-par 71 after starting the day with a three-shot advantage on the difficult Sheshan course.
He posted an 11-under 205 total with one round remaining, while Japan's Hiroshi Iwata (68) birdied the last to occupy second place on 10-under.
German Martin Kaymer (66) and American Bubba Watson (69) were two strokes behind in a tie for third on a tighly-bunched leaderboard.
McDowell is seeking to become a wire-to-wire winner and keep the WGC series in Northern Irish hands after Rory McIlroy won the previous event, the Bridgestone Invitational in August.
(Editing by John O'Brien)