Following the start of the tour validation process for the new prototype 913 drivers last week on the PGA Tour, the momentum continued this week on the European Tour.

It began Monday morning on the range at the Open de France, when France's own Victor Riu teed up his first Pro V1x golf ball and sent it hurtling down the range of Le Golf National.

During that first day of fitting, testing and feedback with Titleist Tour Technicians Phil Dimmock and Mattias Jelver. a further five players got their hands on the prototype 913 drivers.

James Kingston, Guillaume Cambis, Michael Jonzon, Tano Goya and Adrian Otaegui all got dialled in to their optimum shaft and SureFit Tour hosel combinations.

Titleist ambassador Matteo Manassero was an early arrival on Tuesday morning, as he got down to work with Mattias - leaving the range with a big smile on his face!

And the players kept coming, eager to get fitted and see what was different about the 913 drivers - Oscar Floren, Jbe Kruger, George Coetzee and Andrew Dodt all spent time with Phil or Mattias during the course of Tuesday morning.

We'll bring you more on the rest of Tuesday and the whole of Wednesday during the course of tomorrow - plus details of another special fit on the European Tour last week!

To view the slideshow, simply click on the image below:

First out of the gate to test the new prototype 913 driver on Monday was France's Victor Riu

Jamie Donaldson rolled his Titleist Pro V1 golf ball in for four birdies over the final five holes Sunday at the Irish Open to earn his first European Tour victory and lead a four-win week for Titleist players around the world.

Donaldson, 36, was the only player in Northern Ireland to post all four rounds in the 60s (68-67-69-66), punctuating a comfortable four-shot win with a 25-foot birdie putt on the final hole at Royal Portrush.

Through the first half of 2012, Titleist Pro V1 and Pro V1x players have combined for 88 victories across the worldwide professional tours, more than seven times the nearest competitor with 12 and more than all other golf balls combined.

A total of 10,574 players have teed up Titleist golf balls in those same events, as compared to 1,704 for the nearest competitor.

Donaldson's week began Monday at Sunningdale in England, where players gathered for Open Championship International Qualifying. He shot 62 to book his ticket to Royal Lytham & St. Annes.

A few days later, Donaldson kicked off Round 1 at the Irish Open with a hole-in-one at the difficult, into-the-wind par-3 6th, his first ace as a pro.

On Sunday, his name was at the top of the leader board with an 18-under 270 victory total.

“To have a hole in one the first time in a tournament, and to win it, as well, is very special,” he said.

Titleist Brand Ambassador Rafael Cabrera-Bello (Pro V1x) and Pro V1x loyalist Anthony Wall were among three players who tied for second place, as eight of the top nine finishers and 11 of the top 15 relied upon Titleist golf balls for their success.

• CHAMPIONS TOUR: Titleist golf ball loyalist Joe Daley (Pro V1) won the Constellation Energy Senior Players Championship for his first Champions Tour title.

Daley closed with a 2-under 68 en route to a 14-under 266 total and a two-stroke victory over Tom Lehman (Pro V1), who won the Regions Tradition in his last start. Both players shot four consecutive rounds in the 60s.

Daley, a two-time winner on the Tour, posted a tournament-high 24 birdies on the week.

He was one of 53 players in the field that trusted Titleist golf balls for their success, more than five times the nearest competitor with 10 and more than all competitors combined. Titleist was also the choice of more players in the iron sets (20) and sand, lob and approach wedge (56) categories.

?• WEB.COM TOUR: Peter Tomasulo tapped his Pro V1x golf ball in for par on the fourth hole of a sudden-death playoff to top fellow Pro V1x loyalist David Lingmerth and win the United Leasing Championship, the first event on the newly-named Tour.

It marked the third-career victory for Tomasulo, who had spent the last 21 months batting a variety of injuries, including a broken bone in his foot and stress fractures in his ribs.

"This is the first time in a long time that I've felt really healthy," said Tomasulo, who finished regulation at 11-under 277.

"It's a lot of fun being back out here. I miss being out here and playing. This feels great. It's a blast being out here and competing again. I really didn't expect to play well this early."

Eight of the top 10 finishers relied upon Titleist golf balls for their success, including Titleist Brand Ambassador Richard Scott (Pro V1x), who finished solo third, one shot out of the playoff.

A total of 108 players in the field teed up Pro V1 and Pro V1x golf balls, more than seven times the nearest competitor with 15 and more than all golf balls combined. Titleist was also the choice of more players in the iron (42), wedge (153) and putter (56) categories.

• CANADIAN TOUR: Pro V1x loyalist Cory Renfrew won the Syncrude Boreal Open, closing with a course-record 9-under 63 and then winning in a playoff at Fort McMurray Golf Club.

Renfrew finished the four rounds at 17-under 271, birdieing his 72nd hole to force overtime. He won with a 5-foot birdie putt on the fourth extra hole.

"I knew birdie would have to win it," said Renfrew, who began his Sunday round with six birdies over the first seven holes. "I was fortunate to come out on top."

• PGA TOUR: The seeding process of the new Titleist 913 drivers began at the AT&T National, with 14 players putting it in play the first week it was available.  

Among the players putting the new 913D2 prototype drivers into play were Bud Cauley (7.5º), Tom Gillis (9.5º) and John Merrick (8.5º).  

Eleven players gamed 913D3 drivers, including Seung-yul Noh (7.5º), Nick Watney (10.5º), Brendon de Jonge (9.5º), Mark Anderson (8.5º), Ben Curtis (8.5º), Martin Flores (9.5º), Hunter Haas (9.5º), K.T. Kim (8.5º), Tom Pernice Jr. (8.5º), D.J. Trahan (7.5º) and Gary Woodland (7.5º).

Titleist Brand Ambassador Rory McIlroy also put a 913D3 8.5º driver into play at the Irish Open, kicking off the European Tour seeding process that officially begins at this week's French Open.

A total of 81 players at AT&T National trusted Titleist golf balls for their success, more than five times the nearest competitor with 16 and more than all competitors combined. Titleist was also first in iron sets (36); sand, lob and approach wedges (123); and putters (53).

• LPGA: Titleist golf ball loyalists accounted for 99 of the 144-player field at the Walmart NW Arkansas Championship, more than seven times the nearest competitor with 13 and more than all golf balls combined.

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