Defending champion Adrian Lewis survived a first-round scare for the second year running at the PDC World Championship at the Alexandra Palace.
Lewis, who had to recover from 2-0 down against Nigel Haydon at the same stage last year, lost the first set to Gino Vos before recovering to win 3-1.
"The first round is probably the hardest one," said Lewis.
Meanwhile, Robert Thornton, Paul Nicholson and Kevin Painter all booked spots in the second round.
All three men earned 3-0 whitewashes, with Painter defeating Hong Kong's Chun Nam Leung.
Thornton and Nicholson will now meet in the last 32 after wins over Magnus Caris and Co Stompe respectively.