James Hahn, Ryan Moore share lead at Deutsche Bank Championship

American duo James Hahn and Ryan Moore share the lead at the Deutsche Bank Championship after carding five-under 66 in the opening round.

Neither player dropped a shot during Friday's opening session in Boston, with six birdies apiece leaving them at the top of the pile.

Paul Casey is one shot off the pace after a round of 66, while Rory McIlroy finds himself well down the leaderboard following a triple-bogey on the 12th.

There was some bad news for Jason Day, who ended the day one-under-par before learning that his wife had been involved in a car accident, but he later vowed to continue competing in the tournament.