2010 or 2011 World Championship - and won 7–5 to become the first player since Raymond van Barneveld to successfully defend the BDO World Championship. Later in January, Adams successfully defended his Dutch Open crown, once again defeating Winstanley in a close final (3–2 in sets). Adams then reached the singles final at the WDF World Cup where he was defeated by Scott Waites, and also won the doubles event with Waites. At the 2011 World Masters, the three-time defending champion was beaten by eventual champion Waites 5–3 in the semi-finals. 2012 Adams was the top seed at the 2012 World Championship. He beat Scott Mitchell and Gary Stone without dropping a set, but was defeated 5–2 in the quarter-final by former runner-up Tony O'Shea, who went on to reach the final. Adams had a difficult season in 2012, losing in his first match at the Masters 3–1 to Rune David before being eliminated in the group stage of Zuiderduin Masters without winning either of his matches. 2013 At the 2013 World Championship, Adams was beaten 3–2 by teenage débutante Jimmy Hendriks. During the season Adams had been very much focused on his personal life. He lost weight and gave up smoking. Adams eventually refound his form. 2014 At the 2014 World Championship, Adams reached the quarter-finals with comfortable wins over David Cameron, Tony O'Shea (in which O'Shea failed to win a leg) and Ross Montgomery before losing 5–2 to Jan Dekker. Adams got back to world number two and won a number of key tournaments. At the 2014 Winmau World Masters, Adams narrowly missed out on reaching the final for the first time since 2010 as he let a 5–2 semi-final lead slip against Jamie Hughes, also missing 10 match darts in the ninth set. 2015 He opened his 2015 World Championship campaign with a 3–1 victory over Jan Dekker, setting up a tie against Jim Widmayer in the second round. He whitewashed Widmayer 4–0 to advance to the quarter-final stage, where he would face Ross Montgomery. He comfortably beat Montgomery 5–1 to go through to the semi-finals, to play Glen Durrant, who he edged out 6–5 to reach the final. Adams had a near nine darter hitting the treble 20 7 times and hitting the treble 19 but missed the double 12, if he had hit it, he would have been the first person to hit a 9