Tiger Woods struggled on his return from injury as the former world number one started the Hero World Challenge with a 77 in Florida.
The 38-year-old made his comeback at the tournament he hosts, and despite looking comfortable with a new swing, his short game was disappointing on day one.
Woods carded three bogeys and a double bogey on the front nine, before eventually finishing the day in last place in the 18-man field on five-over-par.
A run of five successive birdies was the highlight of Jordan Spieth's round as the 21-year-old continued his recent good form by taking the lead with an opening round of six-under.
American trio Rickie Fowler, Steve Stricker and Zach Johnson sit one shot behind the leader alongside world number two Henrik Stenson.
