The American left-hander, 35, shot a final-round 69 to win by three after overhauling a two-shot deficit on his co-overnight leader Spieth on a sultry day at Augusta.
Scott secured his first major and became the first Australian to win the Green Jacket when he beat Angel Cabrera in a sudden-death play-off
Woods is favourite to win his first Green Jacket since 2005 and first major since 2008 after returning to world number one with three wins this year
Defending champion Charl Schwartzel sought the wisdom of six-time champion Jack Nicklaus last year, while three-time winner Nick Faldo recently bemoaned the fact that none of his countrymen have asked for his advice.
Rory McIlroy fired a stunning six-under 65 to lead the US Open by three shots after the first round at Congressional reports BBC Sport.
McIlroy bounced back from his Augusta aberration to head Masters winner Charl Schwartzel and 2009 USPGA champion YE Yang.
Sergio Garcia and Open champion Louis Oosthuizen were two under, while Graeme McDowell began his defence with a 70.
South Africa’s Charl Schwartzel emerged from the pack to clinch his maiden major title on an absorbing final day at the 75th Masters reports BBC Sport
Schwartzel fired a closing 66, including birdies on the last four holes, to reach 14 under and beat Jason Day (68) and Adam Scott (67) by two shots at Augusta.
Tiger Woods (67), Luke Donald (69) and Geoff Ogilvy (67), tied for fourth at 10 under with Argentina’s 2009 champion Angel Cabrera (71) nine under.
Phil Mickelson will start as hot favourite to defend his title when the 75th Masters begins on Thursday reports BBC Sport
The 40-year-old three-time champion won last week and has 13 top-10 finishes in his 18 appearances at Augusta.
World number two Lee Westwood’s private jet made an emergency landing as he flew to the Masters at Augusta after a fire broke out in the cockpit reports BBC Sport
Westwood, who was travelling from the Houston Open with Ryder Cup team-mate Ross Fisher, said it was “a bit scary”.