Tiger Woods and Justin Rose top the leaderboard after day one of the PGA Tour Championship at the East Lake Golf Course in Atlanta, Georgia.
The tournament sees the world's top 30 players compete for the £1m prize money as well as the chance of winning the £7m FedEx Cup bounty.
Both men carded opening rounds of 66 to leave them on four-under-par overall.
Steve Stricker is joined by Matt Kuchar and two other fellow Americans on three-under, while British Open runner-up Adam Scott is among a group of five a shot further back.
World number one Rory McIlroy cancelled out two bogeys with three birdies to give himself a one-under round of 69.
Fellow Brits Luke Donald and Lee Westwood endured tougher days out on the course with respective scores of one-over and two-over.
