• Sixth seed falls to Ricky Evans in sudden-death leg
• Fifth seed takes first set but loses 3-1 to Scott Williams

Former champion Rob Cross and Dave Chisnall crashed out of the PDC world championship as more seeds were scattered at Alexandra Palace.

Cross, the fifth seed and 2018 champion, lost 3-1 to Scott Williams while Ricky Evans survived a match dart against him to upset Chisnall, the sixth seed, in an epic second-round clash decided by a sudden-death leg.