World number one Rory McIlroy endured a rollercoaster opening round in the WGC-Cadillac Championship at Doral on Thursday.
McIlroy carded three birdies and an eagle in the space of five holes on his back nine, but also recorded four bogeys and a double bogey to return a one-over-par 73.
That was seven shots off the clubhouse lead set by American Ryan Moore.
Starting on the back nine, McIlroy failed to birdie the par-five 10th and then bogeyed the 11th after finding a greenside bunker with his approach and missing from 12 feet for par.
The 25-year-old also failed to get up and down from sand on the 17th before a costly double bogey on the 18th, where he found the middle of the fairway with a superb drive but then pulled his second shot into the water left of the green.
McIlroy finally recorded his first birdie of the day on the par-three fourth and made it two in a row from close range on the next.
A wayward approach to the next finished on the edge of a greenside bunker and led to another bogey, before McIlroy holed from 18 feet for birdie on the seventh and 22 feet for eagle on the par-five eighth.
Getting back to level par was an impressive achievement but McIlroy pulled his tee shot to the ninth left of the green for a closing bogey of a mixed round.