Northern Irish world No 3, who has not won a major since 2014, has improved at the US Open each year and is confident this could be his week.
The 356th-ranked 27-year-old, who will make his Olympic debut alongside close friend Carl Yuan, hopes to learn from the Games successes of outsiders Rory Sabbatini and CT Pan.
Its all starting to come around, Koepka says as a lot of work pays off at Sentosa Golf Club.
American, who dealt with some hip discomfort, is the first golfer to ever break 70 in the first three rounds of a US Open at Pinehurst No 2.
Jinichiro Kozuma fires a nine-under-par 63 at Grange Golf Club, takes one stroke lead ahead of Danny Lee and Carlos Ortiz.
The 24-yea-old Swede, who turned pro last June, is at 5-under 135 midway through, with Bryson DeChambeau, Rory McIlroy and Xander Schauffele all in the mix.
A cohort of Melbourne Storm players could be given the chance to rest in the run to the finals having all but locked up a top-two spot and possibly the minor premiership in Thursday nights bruising away win over Penrith.
Kim Min-kyu shoots five-under 66 to win national championship for second time, as Hong Kongs Taichi Kho bags top 15 finish.
Shane Lowry made a double bogey on the famous Postage Stamp eighth hole at Royal Troon and it only got worse for the Irishman.
Last years winner Ben Campbell will return to defend his title at Novembers tournament, which has a new sponsor.
Things are hotting up with showdowns in football, track and field, tennis and golf.
Weightlifting and womens golf get started, the womens basketball semi-finalists will be determined and its a busy day in athletics.
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Kieran Foran has been lauded as the pound-for-pound toughest bloke in the NRL as the Gold Coast Titan prepares to play his 300th game.
Theres another chapter in a horror season for the Rabbitohs after the match review committee hit Richard Kennar with a grade two careless high tackle charge his third such offence.
Sea Eagles veteran Lachlan Croker says rookie winger Lehi Hopoates potential is scary based on his first few months in the NRL, with the teen sensation striking one of the most exciting wing combinations in the game with Jason Saab who has added weapons to his superpower speed.
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Tensions were running high in the Magic Weekend game between Warrington and Leeds. Sam Lisone and Rodick Tai were shown yellow cards for clashing in the second half.
Highlights from the Magic Weekend clash between Leigh Leopards and Salford Red Devils.
Sky Sports just got even better, bringing you over 50 per cent more sport this year at no extra cost.
Josh Warrington was in the stands as tempers flared between Warrington Wolves and Leeds Rhinos at Ellland Road, with the two-time world featherweight champion getting rather excited as the action unfolded.
Zak Hardakers 14-point haul helped Leigh Leopards keep their Betfred Super League play-off hopes alive as they beat Salford Red Devils 20-0 in the opening game of day two of Magic Weekend at Elland Road.
Matt Dufty scored a hat-trick as Warrington Wolves battled to a 24-6 victory over Leeds Rhinos in the final Magic Weekend match of day one at Elland Road.