Adams reached his fourth World Championship final in the 2011 tournament, defeating Tony West, John Walton, Ross Smith and Martin Phillips to get there. The match against Walton was especially memorable as it went to a sudden death leg, which Adams won despite Walton having the advantage of throw. Adams played Dean Winstanley in the final, the 3rd seed - marking the only time Adams played a seed in either the 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.