Justin Rose admitted he lost to the better man as Jordan Spieth won his first Masters title in emphatic fashion . The 21-year-old finished 18 under to beat Rose and Phil Mickelson by four shots and become the second youngest Masters winner - after Tiger Woods in 1997 . Spieth became only the fourth player after Jack Nicklaus , Ray Floyd and Tiger Woods to reach 17 under . Only Spieth and Wood ever got to 18 under , and Spieth is now the only person to reach 19 under . Jordan Spieth ( right ) receives the Green Jacket from last year 's Masters winner Bubba Watson . Spieth celebrates becoming the second youngest ever Masters winner after his four-shot victory on Sunday . Justin Rose ( left ) congratulates Spieth after the young Texan holes his last shot on the 18th green . McIIroy shot an impressive last-round 66 but could only finish fourth behind Spieth , Rose and Phil Mickelson . Rose , who finished joint-second with Phil Mickelson on 14 under , said : 'Phenomenal , what a month of golf Jordan 's had . Awesome composure ; every time I thought there was a chink in the armour he would come out and hole an eight foot putt . 'Jordan seems to have that same quality right now and he 's very comfortable playing with a lead . 14 under round here I 'll take that every year and take my chances . ' World No 1 Rory McIlroy , who needed to win to complete a career grand slam , finished fourth after a closing 66 and added : 'Jordan started fantastically well and has kept his foot down and been really impressive . ' Tributes poured in for Spieth from his fellow players and other stars as the world reacted to the young Texan 's impressive display .
Jordan Spieth wins 2015 US Masters after finishing 18-under at Augusta . The 21-year-old American won his first major title in a playoff against Rory McIlroy on Sunday and will be the youngest player to win an Open since Bobby Jones did it back in 1936.