McIlroy stays ahead in Florida

Rory McIlroy remained in first place despite playing a shaky first half of his final round at the Honda Classic at Palm Beach, Florida.

The Northern Irishman began the day 12 under par, two clear of playing partner Russell Henley, but both his birdies on the front nine were immediately cancelled out by bogeys.

He dropped another shot at the ninth but remained one shot ahead of Henley and Scotland's Russell Knox, who birdied two of the first three but dropped a shot at the fourth to slip back to 10 under.

Ryan Palmer and Jhonattan Vegas were a shot further back at nine under, with a two-stroke gap over sixth-placed Will MacKenzie.

England's Luke Donald was six under alongside Canadian David Hearn, the clubhouse leader after completing a three-under-par 67, and American Billy Hurley III.

Keegan Bradley fell from nine under back to five, hampered by three successive bogeys from the fifth. The group at five under also contained Spaniard Sergio Garcia.

Further back in the field, world number one Tiger Woods withdrew after 12 holes due to back pain. Woods shot 65 on Saturday to move into contention but was five over for his final round when he called it quits.