World number one Luke Donald will take a two-shot lead over rival Webb Simpson going into day two of the Disney Classic.
The Englishman posted a first-round score of 66 to end the day on six-under par in Florida. Simpson carded a 68 to put him on four-under.
The two players are both aiming to top the PGA Tour money list by the end of the tournament.
"Six birdies, no bogeys is always a good round," Donald said.
"I played a pretty solid round. Couple loose shots at the end. It wasn't that easy out there. The wind was strong enough to make it a little bit tricky with club selection."
Elsewhere, England's Justin Rose hit a two-over-par 75, while South Africa's Retief Goosen shot a round of 68.
