Luke Donald

No. 1 Johnson looks to follow strong Masters at Harbour Town

Dustin Johnson is not satisfied with his Masters' history, no matter how many top-10 finishes he posts at Augusta National.

The top-ranked Johnson wound up 10th in last week's major, his third straight appearance in the top 10 on the challenging layout.

"I definitely expect better," Johnson said Wednesday in prepping for this week's RBC Heritage. "I felt like I played well enough to win last week."

The problem was simple enough to identify — watching putts not fall in.

"The thing that's most frustrating is it wasn't that I was hitting bad putts. I was actually hitting good putts, they just weren't going in," he said.