His one good run came in the 2005 PDC World Darts Championship, reaching the quarter-finals before losing to former World Masters champion Mark Dudbridge. He has since suffered six successive second round exits in the World Championship – against Steve Alker in 2006, against Alan Tabern in 2007 (in a thriller that went to a sudden death deciding leg, with Ovens narrowly missing a double 12 for a perfect nine dart finish and a £15,000 bonus), in 2008 against Dutchman Jan van der Rassel, after defeating Colin Monk in the first round, in 2009 to Ronnie Baxter having defeated Steve Maish 3–0 in the first round, in 2010 to Colin Lloyd and in 2011 to Simon Whitlock.