Rory McIlroy misses the chance to extend his lead as he fails to sink his birdie putt.

Shane Lowry gets a much-needed birdie to remain in contention after a testing few holes.

Sepp Straka cards a par to stay 15 under.

Tom Kim and Cam Davis make par, but it is a bad hole for Justin Rose, who is falling behind.

He misses another birdie attempt which sees him trail by three.

McIlroy responds with a birdie of his own after a putt to move out in front on his own again.

Shane Lowry was in a bit of trouble at the start of this hole, with his ball landing just on the water's edge, but he recovers well to make par.

Sepp Straka bogeys and is now two behind McIlroy.

Lucas Glover is making a sustained push up the leaderboard as he chips in for another birdie to draw level at the top.

Tom Kim makes a par to stay in the lead with Rory McIlroy and Sepp Straka.

Cam Davis misses the chance to birdie and join him at the top of the leaderboard, having to settle for par.

Justin Rose feels the effect of the breeze as he bogeys to slip to two behind.

Lucas Glover moves one behind the joint leaders with a birdie at the 10th.

McIlroy's approach takes a kind bounce off the bank and onto the green with the world number three two-putting for a par four.

Lowry comes up short with his second shot and pitches to 20 feet before holing for a crucial par.

Sepp Straka gets up and down for his par.

Tom Kim joins Rory McIlroy and Sepp Straka on 16 under with a birdie on the par-four ninth.

It's pars for Justin Rose and Cam Davis but that's a tough hole out of the way.

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Lucas Glover is now two back after dropping a shot at the difficult ninth hole.

Rory McIlroy leaves his chip short at the par-four eighth and then leaves his par putt short, so he drops back into a share of the lead.

Shane Lowry also fails to make par while Sepp Straka plays a good bunker shot and holes from 10 feet for a four.

It's tight at the top with McIlroy and Straka a shot clear of Justin Rose, Cam Davis and Tom Kim.

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Rose splashes out from the bunker to 15 feet and his par attempt agonisingly sails round the rim of hole and out - it's a bogey and he's now two back.

Cam Davis and Tom Kim post pars and the trio are all on 15 under.

Rory McIlroy curls in an excellent 20-foot putt on the par-three seventh and his birdies takes him a shot clear.

Shane Lowry and Sepp Straka have longer birdie attempts but they both have to settle for par.

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Tom Kim moves back to 15 under thanks to a birdie on the seventh while it's pars for Justin Rose and Cam Davis.

Rory McIlroy is on the green at the par-five sixth in two but he three-putts and wastes the chance to move clear at the top.

Shane Lowry pushes his second shot wide right into some horrible stuff, and after failing to find his ball has take a penalty drop.

His fourth shot spins just off the green and an aggresive par attempt zips beyond the hole before sinking a 10-foot putt for bogey.

Sepp Straka's picks up his first birdie of the day and he replaces Lowry in a group of three on 16 under.

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Justin Rose's wayward drive at the par-five sixth results in a penalty drop but he hits a fine third shot and he gets a par.

Cam Davis also cards a five but it's a bogey for Tom Kim and he drops two back.

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Lucas Glover has a short putt for birdie to tie for the lead, but it slips out at the sixth and it's just a par.

Big chance squandered for the American.

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Rory McIlroy is the only player in the group to find the green at the par-three fifth but just misses for birdie from 15 feet.

It's also a par for Shane Lowry, who holes out from five feet, and Sepp Straka.

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Three pars at the fifth and Justin Rose remains in a share of the lead.

Shane Lowry bounces back from a bogey at the third with a birdie at the next hole and the Offally man is back in a tie for the lead.

Rory McIlroy holds his nerve to hole from five feet for par after chipping past the hole.

Sepp Straka also posts a par and remains a shot adrift.

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Lucas Glover picks up his second birdie of the round at the fifth and he joins the group one off the pace.