Justin Thomas had a two-stroke lead before he started the 2019 Tour Championship, but he couldn't keep the outright lead Thursday.
Under the new format, players began the tournament with a score relative to their place in the FedEx Cup standings. Thomas opened the day at 10 under par, followed by Patrick Cantlay at eight under.
Thomas started with at least a six-shot advantage over 25 of the 30 competitors, but he went into the clubhouse in a three-way for the lead, along with Xander Schauffele and Brooks Koepka.
Here's the top of the leaderboard from Atlanta's East Lake course, via PGATour.