It was first blood to Luke Donald when he took on Rory McIlroy, the man who dethroned him as World Number One on Sunday, and Lee Westwood in Miami.
The top three players in the Official World Golf Ranking were paired together for the start of the World Golf Championships-Cadillac Championship and Donald's pitch to four feet gave him a birdie on the long tenth
McIlroy and Westwood were both bunkered by the green in two and, while the Northern Irishman made par, Westwood flew over the green into water and started with a bogey six.
Fellow Englishman Paul Casey had an eventful return to the sport.
Out since dislocating his shoulder snowboarding on Christmas Eve, Casey birdied the first two holes, but bogeyed the next.
It put him one behind the two early pacesetters, Spaniards Alvaro Quiros and Rafael Cabrera-Bello.
Westwood was not the player to have a six on his card early on - so did Phil Mickelson at the long 12th after pitching into sand.
Westwood also bogeyed the next two holes, but Tiger Woods picked up exactly where he left off last weekend - with an eagle.
Second to McIlroy at the Honda Classic, Woods hit his second shot to within two feet of the flag on the 529 yard first and instantly became part of a 12-way tie for the lead on two under.
