Frittelli clinched his first US tour victory in style with a seven-birdie, seven-under-par 64 at TPC Deere Run, after starting the day two strokes off the pace.

He finished at 21-under 263, while American Russell Henley shot a sizzling 61 to vault into second place.

FINAL LEADERBOARD

A two-time winner on the European Tour, Frittelli, 29, quickly set his sights on the Open that starts at Royal Portrush on Thursday after earning his spot in the field.

"I'll hopefully jump on that (charter) flight tonight and head over to the Open," he told CBS television.

"Hopefully I can be calm by the time I get there but I'm sure it's going to be a fun flight."

Youngster Cameron Davis was the leading Australian but well back in a tie for 58th at eight under after a closing 70.