BDO World Darts: Martin Adams beaten by Jan Dekker Three-time champion Martin Adams was knocked out of the BDO World Darts quarter-finals as Jan Dekker produced a thrilling 5-2 victory. Dekker surged into a 3-0 lead but Adams checked out with a 161 to pull a set back before closing the gap to one set. But the Dutchman responded after falling two legs down in the sixth set to move 4-2 ahead. After missing five match darts, Dekker held his nerve to win the seventh set and reach his second semi-final.