Back-to-back birdies at the second and third holes helped Bernd Wiesberger to the top the Masters leaderboard. Photo: Erk S. Lesser/EPA

AUGUSTA – Austrian Bernd Wiesberger put together back-to-back birdies at the second and third holes Friday to move atop the Masters leaderboard at 4-under par as overnight leader Jordan Spieth fell back.

Spieth, who counts the 2015 Masters among his three major titles, started the second round with a two-stroke lead after a 6-under par 66 on Thursday.

But he dropped three shots in the first two holes -- with a double bogey at the first and a bogey at the second -- to come back to the pack and was 2-under for the tournament through seven.

Americans Rickie Fowler and Matt Kuchar were 3-under through nine, with Sweden's Henrik Stenson, Canadian Adam Hadwin and Americans Patrick Reed and Charley Hoffman all set to tee off in the afternoon after posting 3-under rounds on Thursday.

Also waiting in the wings was 14-time major champion Tiger Woods, back at the Masters for the first time in three years and aiming to make a charge after a 1-over 73 on Thursday.

Northern Ireland's Rory McIlroy, who can complete a career Grand Slam with a first Masters win, briefly grabbed a share of the lead, answering an opening three-putt bogey with birdies at the par-5 second and par-4 third. But bogeys at the fourth and sixth left him at 2-under through eight.