Koepka added one more birdie to his total to get to 13-under, even as his closest rival, Jon Rahm, slipped from 10-under to nine-under and the lead had swelled to four shots at the 87th Masters.
There was a three-way tie at the top with Viktor Hovland rising to the occasion in Tiger Woods' company and Jon Rahm showing he is a fighter to the core and Brookes Koepka once again emphasizing his focus at the Majors