Patrick Reed made only the third hole-in-one ever seen at Winged Foot in a U.S. Open during Thursday's opening round.

The American stepped up to the par-three seventh having just made a birdie on the previous hole, and his day was about to get a whole lot better.

With 165 yards between tee and the pin, Reed's shot initially hit the green a few yards short but then bounced straight in, much to the 30-year-old's disbelief.

Reed, who almost looked embarrassed by the ace, subsequently moved to one under par, having earlier made double bogey at the par-four fifth.

The 2020 U.S. Open is the sixth edition to be held at Winged Foot.

Mark McCumber made a hole-in-one at the 10th hole when Winged Foot staged the major in 1984, while Peter Hedblom had his moment of glory in 2006 at the third hole.