Chris Wood carded a bogey-free 65 to set the clubhouse target and sit atop a congested leaderboard on day one of the KLM Open.
The Englishman made six birdies in the morning to get to six under but there were 14 players in the clubhouse within two shots at The Dutch.
Italian pair Andrea Pavan and Renato Paratore, English duo Aaron Rai and Matthew Southgate, Frenchman Benjamin Hebert, Dane Søren Kjeldsen, Australian Jason Scrivener and American Kevin Stadler were all at five under.
Wood is searching for European Tour win number four having last won at the 2016 BMW PGA Championship and has finished second twice this season at the NBO Oman Open and the Rolex Series HNA Open de France.
Paratore was out in the very first group of the day from the tenth and got off to a fast start with birdies on the tenth, 12th, 13th, 14th and 16th to turn in 31.
For a long while that was enough to leave him two ahead of Wood, who had a hat-trick of birdies from the 13th, but when the 30 year old made another gain on the third, the lead was down to one.
A group began to build at four under and Pavan and Hebert were both part of it.
Pavan turned in 35 and then birdied the first and fourth before getting on the par five sixth in two, while Hebert made birdies on the third, fourth, sixth and eighth.
Wood hit an excellent approach into the seventh to finally give Paratore some company and Pavan repeated the trick to make it a three-way tie.
Paratore finished with 11 pars to set the target but Wood got past him on the ninth, putting his second to five feet for a closing birdie.
Pavan closed with two pars to sign for a 66 and then Hebert made a move to the top of the leaderboard with gains on the par three 14th and 16th before dropping a shot at the last.
Stadler birdied the 14th, 15th, 18th and first and bounced back from a bogey on the second with gains on the fifth and seventh.
Kjeldsen had started his round with a bogey but he bounced back in some style with birdies on the third, sixth, seventh, ninth, 12th and 13th to get within one of the lead.
Rai turned in 35 and then followed birdies at the second and fifth with an eagle on the sixth, while Southgate was bogey-free while making gains at the sixth, 12th, 13th, 14th and 16th.
Scrivener was another player to turn in 35 from the tenth, sandwiching an eagle on the sixth with birdies on the fifth and ninth.
South African duo Haydn Porteous and Jaco van Zyl, Thai Phachara Khongwatmai, Italian Matteo Manassero, England's Richard McEvoy and Swede Henric Sturehed were two shots off the lead, a shot ahead of a group containing Ryder Cup Vice Captains Padraig Harrington and Lee Westwood.