All the action as it happened in the third round at Olympia Fields.
Jim Furyk took firm control of the US Open with a three-under 67 on Saturday.
Furyk, now 10 under, is three shots ahead of unheralded Australian Stephen Leaney, and five shots clear of Vijay Singh and Nick Price.
Price had earlier threatened to steal Furyk's thunder when he birdied five of the first six holes, but bogeys at the 7th, 9th, 11th, 12th and 16th checked his charge.
Meanwhile, defending champion Tiger Woods endured a miserable day, dropping shots at the 4th, 9th, 10th, 12th, 15th and 16th to finish his round at one over.
Leaderboard (US unless stated):
-10 J Furyk (18)
-7 S Leaney (Aus) (18)
-5 N Price (Zim) (18), V Singh (Fij) (18)
-4 D Pride (18), I Leggatt (Can) (18), E Romero (Arg) (18), J Byrd (18)
All times BST
0105: A third straight bogey down the stretch leaves Singh's challenge in tatters, while Furyk compounds the Fijian's misery by holing a bomb on 18 to go to 10 under and a three-shot tournament lead. Singh is now five shots back.
0050: Singh follows his bogey at 16 with another at 17 after finding sand with his iron to the green. But Furyk then records his first three-putt of the tournament to drop back to nine under. Leaney is now in the final group on Sunday.
0040: The pressure appears to be getting to Singh after he follows a great recovery shot to the 16th green with three putts from 18 feet. Furyk responds with another sand-save to remain on 10 under, three shots clear.
Australia's Leaney, meanwhile, cards a superb birdie on the 18th to join Singh on seven under.
0025: Furyk makes what might be a significant move when he nails a huge birdie putt on the 15th to take a two-shot lead over Singh. The Fijian's birdie attempt goes agonisingly close and he remains on eight under.
0010: Leaney picks up a birdie at the tricky 15th to move within three shots of Furyk, while Woods finishes a five-over-par round he will want to quickly forget.
0005: A superb sand-save at 13 rescues Furyk's par and maintains his one-shot lead over Singh. Up ahead at the 18th, a wonderful approach shot gives Price a simple putt for a birdie, his first since the 6th, to take him to five under.
2350: Singh overhits his approach to the 12th and is forced to chip from in front of the grandstand. The Fijian cannot get down in two to save his par, while Furyk is just short with a putt that would have given him a two-shot lead. Byrd, meanwhile, cards a double bogey at the 13th.
2345: Price and Leonard continue to go backwards, while Byrd is forced to reload on the 13th after hooking his drive out of bounds. Woods cards his sixth bogey of the round at the 16th.
2335: While the leading pair are going agonisingly close to birdies on the 11th, Jonathan Byrd is bogeying the 12th, and Leonard is bogeying the 14th. Woods, meanwhile, follows his birdie at the 14th with a three-putt bogey on the 15th.
2325: The chasing pack are starting to falter. Leaney and Leonard drop shots at the 11th and 12th respectively, but Woods cards his first birdie of the day at the 14th to return to minus numbers.
2315: Furyk's stay at double figures under par is brief as he bogeys the 10th after finding sand with his drive. He rejoins Singh on nine under. Woods' round refuses to get better as he cards his fourth bogey of the day at 12.
2305: Disaster strikes Leaney when he thins his pitch from the rough beside the 10th green all the way across the putting surface. A double bogey is the result and he now trails Furyk by four.
2300: Furyk continues his careful accumulation of birdies with a three at the par-four 9th. Playing partner Singh, now a shot back, has to settle for par despite an enormous 360-yard drive.
2250: Leaney maintains his surprise challenge with a birdie at the 9th to close to within a shot of the leaders.
But Price's decline goes on with his fourth bogey in six holes at the 12th.
2235: After his sparkling start, Price is now locked in reverse, as he gives up another shot on the 11th to fall three shots back on the leaders. Woods' woes grow as he bogeys the 10th.
2220: Woods looks a shadow of usual self as he misses another short par putt at the 9th to fall seven shots behind the pace set by Furyk and Singh, who take different routes to birdies at the 6th.
2215: Price's purple patch appears to be well and truly over as he misses a short par putt on the 9th to slide to seven under. Singh, meanwhile, hooks his drive into the crowd
on the 6th, and Leonard bogeys the 7th.
2205: Justin Leonard birdies the par-five 6th to join Leaney in a tie for fourth - the former Open champion is three under for the day.
2200: Furyk cards his first birdie of the round after his superb approach at the 5th sets up an easy birdie putt. The steady American is once more in a share of the lead at eight under.
2155: Australia's Stephen Leaney moves into a tie for third with Furyk with a huge birdie putt on the 5th.
2145: Woods' struggles continue when he fails to birdie the par-five 6th - another straightforward putt staying above ground. Price, meanwhile, finds a terrible lie in a greenside bunker at 7th. The veteran cannot get up and down and returns to a share of the lead with Singh.
2135: Price continues to be right at Olympia Fields as he birdies the long 6th - his fifth in six holes - to retake sole possession of the lead on nine under. Watson cards a bogey six after finding the greenside bunker with his fourth shot.
2125: A wonderful approach shot to the par-four 2nd sets up another birdie chance for Singh but the Fijian pushes the putt past the hole. Moments later Woods misses a six-footer to bogey the 5th and fall back to three under - five behind Singh and Price.
2122: Canada's Ian Leggatt moves into contention at six under with an eagle on the par-five sixth.
Nick Price's hot streak ends when he pars the 5th.
2115: Overnight co-leader Vijay Singh makes the perfect start to his third round by birdieing the 1st to move alongside the charging Price. Playing partner Jim Furyk can only manage a par to stay on seven under.
2100: Moments after the overnight leaders tee off, Nick Price sinks an incredible fourth straight birdie at the fourth hole to take the outright lead at eight under.
2100: Leaders Jim Furyk and Vijay Singh open with solid drives on the first.
2055: Nick Price continues his superb start, sinking a short birdie putt on the third to join the leaders at seven under.
2055: Darren Clarke makes his second consecutive birdie at the seventh to go to three under, where he joins Tiger Woods, who pars the first two holes.
2045: Birdies at the opening two holes leave Nick Price just one shot off the lead at six under par, while playing partner Tom Watson makes two steady pars.
2033: Tiger Woods fires a huge drive down the middle of the first fairway as he looks to close on the leaders.
2030: Mike Weir gets another birdie to go out in 32 and move within three of the lead at four under.
2020: Tom Watson tees off at the first and sends his drive into the left rough.
2010: A bogey on the par-four third sees Darren Clarke slip back to one under par.
2000: Mark Calcevecchia birdies the sixth to join a group of six players on three under.
1945: Masters champion Mike Weir holes a huge eagle putt on the sixth to move into contention at three under par.
1940: Darron Stiles starts sensationally with three birdies to go four under.
1930: A 30ft birdie putt on the 18th brings a smile to Colin Montgomerie's face as he finishes with a round of 71 to lie four over par.
1920: Brian Davis ends his round with three bogeys for a 74 and he will go into the last day at seven over par.
1915: Phil Mickelson misses a lengthy bogey putt on the fifth and slips back to level par.
1905: Justin Rose makes his third birdie of the day to join the group at two-under-par.
1855: An early birdie for Masters champion Mike Weir takes him to one-under-par.
1850: Padraig Harrington bogeys the sixth to fall back to one-under-par, while Phil Mickelson birdies the third to go to one-under.
1830: The Padraig Harrington surge continues as the Irishman gets to two-under after his third birdie in five holes.
1820: Padraig Harrington makes his second birdie in four holes to move to one-under-par - two-time US Open champion Lee Janzen joins him on that mark.
1805: Excellent starts from Justin Rose and Padraig Harrington, who manage early birdies to join an increasing pack of players at level par. However, Colin Montgomerie is now six-over-par - it seems a long time since he led the tournament on Thursday.
1755: John Rollins makes a major move, with four birdies and a bogey during his opening eight holes to get to level par.
1744: The Olympia Fields course still punishes wayward shots - Charles Howell III suffers a double bogey at the 212-yard par three seventh.
1725: Kevin Sutherland and Charles Howell III both get to level par after excellent starts to their rounds.
1715: Back-to-back birdies for American Scott Verplank get him to one-over-par, with compatriots Kevin Sutherland and Charles Howell III also at that mark after good starts.
1655: Colin Montgomerie's miserable round continues as he slips to five-over-par after a bogey five at the fifth.
1640: It is back-to-back birdies for Retief Goosen, who moves to one-over par for the tournament.
1634: 2001 champion Retief Goosen birdies the second hole to get to two-over.
1620: It is set to be a colourful day for Jay Don Blake, who has two birdies and a bogey in the first four holes.
1600: It is a miserable start for Colin Montgomerie, who bogeys the first hole to fall to four-over-par.
1530: The first pairing of American Jay Don Blake and the unlikely figure of Britain's Brian Davis tee off.