Aberdonian Law left the field trailing in his wake as he stormed to a six-shot success in the MENA Tour’s Sotogrande Masters.
Two ahead at the start of the final round at La Reserva Golf, the 24-year-old closed with a 68 for a seven-under-par 209 total.
His winning margin equalled the record for the third-tier circuit, set by England’s Ross McGowan when he won the 2012 Abu Dhabi Golf Citizen Open.
“It feels really great to win my first tournament on the MENA Golf Tour after two runner-up finishes (in 2013),” said Law after receiving the winner’s trophy and a cheque for $9,000 from nine-time European Tour winner Manuel Pinero.
“The thinking was to stay in the moment and focus on what I needed to, which was making birdies.”
One-over for the day after six holes, the two-time Scottish Amateur champion then picked up shots at the seventh and nine before covering his back nine in three-under.
“Basically, I tried to play golf the way I did on the first two days,” he added. “It’s a tough golf course from tee to green, but I putted well and took opportunities that came my way.”
The Paul Lawrie Golf Centre player, who is trying to keep his game sharp as he waits on the Challenge Tour starting up for proper this season, is the third Scot to win on the MENA Tour after Paul Doherty and Clarke Lutton.
“The Tour is travelling to new places which is fantastic,” said Law, whose previous successes as a pro include the Northern Open, the Paul Lawrie Invitational and a couple of successes on the Pro Golf Tour.
“We are lucky to play on this course which is by far one of the best in Spain.”
His nearest challenger was Zane Scotland after the Englishman, winner of the season’s opening event in Morocco, carded a final-round 69.
McDonald, meanwhile, broke par in his first start as a pro in the PGA EuroPro Tour Qualifying School final at Frilford Heath in Surrey.
After a one-under 71, the Ayrshireman is sitting three shots behind the leader, Truro’s Billy Downing, in the 54-hole battle for 30 cards.
Alongside McDonald is Paul McKechnie, the Braid Hills Golf Centre player who topped the circuit’s inaugural Order of Merit.