Gallery: USPGA Championship Round 1

The best pictures from a brilliant USPGA Championship Round 1 at Baltusrol

All the best pictures from an entertaining USPGA Championship Round 1

Related: Baltusrol Golf Club Hole by Hole Guide

USPGA Championship Round 1

2002 USPGA Champion Rich Beem shot a brilliant 1-under 69.

USPGA Championship Round 1

Andy Sullivan looking colour coordinated on his way to a 67.

USPGA Championship Day 1

Jimmy Walker reacts to a chip shot on the 12th.

USPGA Championship Round 1

Walker signed for a 65 (-5) to take the day 1 lead.

USPGA Championship Round 1

A good day was had by 2010 USPGA Champion Martin Kaymer. The German shot 66 (-4).

USPGA Championship Day 1

2016 Senior USPGA Champion Rocco Mediate was enjoying the warm weather.

USPGA Championship Round 1

Wentworth's Ross Fisher shot an excellent 66 (-4) to be one off the lead.

USPGA Championship Round 1

Champion Golfer of the Year Henrik Stenson hitting in to the 4th. He shot a solid 67 (-3) to lie two back and become bookies' favourite.

USPGA Championship Round 1

Stenson and Willett share a joke on the final hole.

USPGA Championship Round 1

The year's three major champions...

USPGA Championship Round 1

Three USPGA titles between them.

USPGA Championship Round 1

McIlroy hitting his second shot on the last, he failed to birdie both the par-5 17th and 18th.

USPGA Championship Round 1

Rory would sign for a disappointing 74 (+4) to lie nine behind leader Jimmy Walker.

USPGA Championship Round 1

Argentina's Emiliano Grillo teeing off the sixth. He shot a brilliant 66 (-4).

USPGA Championship Round 1

Defending champion and world number one Jason Day, despite only arriving at Baltusrol on Wednesday, shot a 68 (-2).

USPGA Championship Round 1

It wasn't the day US Open champion Dustin Johnson was hoping for. He carded a 77 (+7) and now looks likely to miss the cut.

USPGA Championship Round 1

Looking back down the par-3 fourth hole.

USPGA Championship Round 1

Jordan Spieth walks to the first.

USPGA Championship Round 1

The Texan battled to a round of level-par 70.

USPGA Championship Round 1

Bubba, Sergio, Spieth and Michael Greller.