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Japan's Hideki Matsuyama got off to a slow start as he bids to win his third Waste Management Phoenix Open title - while Justin Thomas and Rickie Fowler share the lead.
The American pair both shot clean rounds in Scottsdale, with Thomas carding five birdies across six holes of the back nine to grab a share of the lead.
Fowler holed an eagle putt on the par-5 13th on his way to 64, matched by Harold Varner who also went round in seven-under.
Scotland's Martin Laird is a shot behind, having started his round with a birdie-bogey-eagle, while England's Tyrrell Hatton is tied for 6th on five under.
Matsuyama won the title in 2016 and 2017 and was gunning for a third-straight in 2018 when he was forced to withdraw with a wrist injury.
The 20 most beautiful golf courses in the worldShow all 20 1 /20The 20 most beautiful golf courses in the world The 20 most beautiful golf courses in the world Augusta National Golf Club, Georgia One of the most famous golf courses in the world.
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The 20 most beautiful golf courses in the world Tralee Golf Club, Co. Kerry Tralee Golf Course was the first European golf course designed by Arnold Palmer.
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The 20 most beautiful golf courses in the world Cave Course, Pinnacle Point Beach and Golf Resort, South Africa The Cave Course in particular is one of the most striking courses in the world.
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The 20 most beautiful golf courses in the world The Old Course, St Andrews Renowned worldwide as “The Home of Golf”.
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The 20 most beautiful golf courses in the world Oconee Course, Reynolds Plantation, Georgia Hosted the 2007 PGA Cup.
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The 20 most beautiful golf courses in the world Old Head Golf Links, Co. Cork The Old Head's unique headland reaches out over two miles into the Atlantic Ocean.
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The 20 most beautiful golf courses in the world Doonbeg Golf Club, Co. Clare A Trump International course, but don't let that put you off.
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The 20 most beautiful golf courses in the world Arnold Palmer Private Course at PGA West, California PGA West boasts six legendary golf courses, with the Arnold Palmer Private Course particularly striking.
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The 20 most beautiful golf courses in the world Kauri Cliffs Golf Course, New Zealand One of New Zealand's finest courses.
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The 20 most beautiful golf courses in the world Cape Kidnappers Golf Course, New Zealand The Tom Doak designed course regularly features in top 100 golf courses in the world.
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The 20 most beautiful golf courses in the world Thracian Cliffs Golf Course, Bulgaria A Gary Player Design signature course.
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The 20 most beautiful golf courses in the world Banff Springs Golf Course, Canada A stunning course located under the snow-capped peaks of Sulphur Mountain and Mount Rundle.
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The 20 most beautiful golf courses in the world Royal Aberdeen Golf Club The Royal Aberdeen Golf Club claims to be the sixth oldest golf club in the world.
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The 20 most beautiful golf courses in the world Crans-sur-Sierre Golf Club, Switzerland A striking course in the shadow of the Alps.
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The 20 most beautiful golf courses in the world Whistling Straits, Wisconsin Has hosted the PGA Championship three times.
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The 20 most beautiful golf courses in the world Liberty National Golf Club, New Jersey Boasts stunning views of the New York City skyline.
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The 20 most beautiful golf courses in the world Pebble Beach Golf Links, California Widely regarded as one of the most beautiful courses in the world.
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The 20 most beautiful golf courses in the world Corales Golf Club, Dominican Republic Designed along natural cliffs, bays and ocean coves.
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The 20 most beautiful golf courses in the world Kingsbarns Golf Club Stages The Alfred Dunhill Links along with the Old Course.
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The 20 most beautiful golf courses in the world Spyglass Hill Golf Course, California Part of the world famous Pebble Beach Company.
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His round of 68 was enough for joint 27th alongside 12 other players, including partner and defending champion Gary Woodland, and Phil Mickelson who is making a record 30th appearance in the event.
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