2021 Masters: Reigning champion Dustin Johnson believes Augusta National's difficulty will ramp up in April | CBS Sports Headlines 2021 Masters: Reigning champion Dustin Johnson believes Augusta National's difficulty will ramp up in April A 20-under score is unlikely to be play with the Masters back in its normal spot … Continue reading 2021 Masters: Reigning champion Dustin Johnson believes Augusta National's difficulty will ramp up in April