Spanish veteran Miguel Angel Jimenez shot an opening round of 64 to take an early one-shot lead at the KLM Open at Kennemer Golf Club.
The 49-year-old, who is already the oldest winner in European Tour history, fired eight birdies and two bogeys to end the day on six-under par.
The last of those birdies on the 18th took Jimenez out of a logjam at the top of the leaderboard, with compatriot Pablo Larrazabal, Ireland's Damien McGrane, England's David Howell, Paraguay's Fabrizio Zanotti, Scotland's Gary Orr and Australian Robert Allenby all on five under.
"It was a little windy which made it more interesting but I am playing very well, very solid and a few birdies in the last few holes helps a lot," Jimenez said.
"Holing a 40-metre pitch on the 16th for a birdie also helps."
Allenby and McGrane had reached six under but both dropped shots on the par-three 17th, while Howell was inches away from winning a BMW M6 Gran Coupe worth £70,000 for a hole-in-one on the same hole.
Howell said: "As it landed I looked behind me to see if there was a car as a prize and I couldn't see one.
"But then I saw one out of the corner of my eye and turned back to the green, but unfortunately it came up just short.
"A new BMW would've come in very handy with twins on the way at the end of the year. I think we might've upgraded to an X5, but it wasn't to be.
"I couldn't have come much closer, but you need a bit of luck for a hole in one, and the birdie was still very welcome all the same."
Orr, who has needed to visit the qualifying tour in each of the last two seasons to regain his card, is currently 234th in the money list after playing just seven events due to a recurring back injury.
Ryder Cup captain Paul McGinley carded a two-under par 68 to finish alongside Irish Open winner Paul Casey, while home favourite Joost Luiten was a shot behind after a 69.
BMW PGA Championship winner Matteo Manassero carded a 70, while Belgium's Nicolas Colsaerts recovered from being three over after seven holes to get back to level par, but then ran up a triple-bogey seven on his final hole to card a 73.