Defending champions the United States have work to do following Thursday's opener against the Internationals at Royal Melbourne.
Justin Thomas took a backseat as Tiger Woods birdied six holes to ensure the United States won the opening four-ball match.
Tiger Woods continues to purr on the opening day but the Internationals have the upper hand against the USA.
Not in Melbourne for the 13th Presidents Cup, American golfer Phil Mickelson is watching the USA from afar.
Tiger Woods opened the Presidents Cup with back-to-back birdies in the opening four-ball contest at Royal Melbourne Golf Club.
Captain Tiger Woods is determined to lead by example and play his part in getting the USA off to a strong start in Melbourne.
Tiger Woods and Justin Thomas will team up for the United States to begin the Presidents Cup.
Cameron Smith's friendship with Patrick Reed is over after the controversy at the Hero World Challenge.
Returning from knee surgery at the Presidents Cup, Dustin Johnson said he was ready to go.