LIV Miami, round one leaderboard
-5 P Reed (US); -3 D Johnson (US), B DeChambeau (US), P Mickelson (US); -2 S Garcia (Spa), C Schwartzel (SA), S Munoz (Col)
Selected: +1 J Rahm (Spa); +6 J Niemann (Chi), T Hatton (Eng)
Five of the top seven on the LIV Miami leaderboard after round one are former Masters champions as preparations for next week's first major of the year gather pace.
Despite dropping two shots on his final hole, Patrick Reed, the 2018 winner at Augusta National, leads the way on five under par.
He is two clear of three-time champion Phil Mickelson and 2020 victor Dustin Johnson who carded three-under 69s.
South African Charl Schwartzel (2011) and Spain's Sergio Garcia (2017) are in a group at two under.
Two-time US Open winner Bryson DeChambeau, who recorded his best Masters finish last year when he ended joint sixth, is alongside fellow Americans Mickelson and Johnson after an opening 69.
It was a day of difficult scoring at Trump National Doral, with a strong wind making the course a "beast" according to Reed, who won a World Golf Championships event at Doral in 2014.
"I know how hard this place can get," added the 34-year-old who is the solo leader at a LIV event after any round for the first time in 37 starts.
"When the wind blows here, it's nerve-wracking. There's a reason why it's called the Blue Monster."
Mickelson, who won the last of his three Green Jackets in 2010, called Reed's round "exceptional" given the conditions.
The average score was two and a half shots over par, while 19 of the 54 players shot rounds of 76 or higher.
Chile's Joaquin Niemann, who has won two of the LIV's season's opening four events and is expected to do well at Augusta next week, opened with a six-over-par 78.
England's Tyrrell Hatton, who will also head to Georgia after the 54-hole LIV event finishes on Sunday, also took 78 shots. Hatton plays in the same Legion XIII team as 2023 Masters champion Jon Rahm, who shot a 73.