This is the incredible moment former PGA Tour winner and world No 75 golfer Adam Hadwin was tackled by heavy-handed security on the green at the Canadian Open on Sunday night.

Nick Taylor's incredible playoff win over Tommy Fleetwood sparked jubilant scenes on the 18th green, and his friends immediately rushed towards him to celebrate.

Among them was Hadwin - himself a top Canadian golfer in his own right who had played in the tournament - but one security guard didn't appear to recognize him and took matters into his own hands.

Shocking footage filmed by journalist Kayla Gray showed Hadwin pop a bottle of champagne and start spraying it at Taylor and his caddie, who were celebrating the winning putt.

Immediately, the security guard rushed Hadwin and pushed him to the ground, before others quickly surrounded the pair on the turf.

Taylor's caddie was among those rushing to help Hadwin, who was just eager to celebrate his countryman's $1.62m victory in the tournament.

Taking to Twitter in the aftermath, Englishman Tyrell Hatton, who was also in attendance and cheering for his own countryman Fleetwood, said: 'Gutted for Tommy but what a way to win your national open!

'Mad scenes! Praying for Adam Hadwin, what a tackle,' followed by laughing emojis.

In the tournament itself, Taylor had just hammered home an eagle putt from 72 1/2 feet on the fourth playoff hole to beat Fleetwood and become the first Canadian winner of the RBC Canadian Open in 69 years.

Playing the par-5 18th hole for the third time of the playoff, Fleetwood hit a pitch shot to get on the green in three, while Taylor had reached the green in two shots and had a long uphill putt from a lower tier of the green complex.

Taylor's putt tracked straight toward the center of the cup, hit the flagstick and dropped in. Taylor flipped his putter in the air and embraced his caddie before fans made their way down from the grandstand. Per the CBS broadcast, it was the longest made putt of Taylor's career.

The 35-year-old from Abbotsford, British Columbia, led the tournament for a good portion of the fourth round, briefly slipped behind and then birdied the 17th and 18th holes to post a 6-under 66 and set the clubhouse lead at 17-under 271.

Fleetwood shot a 67 to join him there, one shot better than Englishmen Tyrrell Hatton and Aaron Rai and Taiwan's C.T. Pan.

Taylor stepped to the 18th tee needing a par to tie the group at 16 under and a birdie or better for the outright lead. He went over the green in two and pitched to 11 1/2 feet for a birdie attempt.

Taylor's putt had a massive right-to-left curl and died right at the hole. He pumped his fist and took several steps backward in celebration as the Canadian fan base went wild in celebrating their countryman.