Michael van Gerwen has started his defence of the Grand Slam of Darts with a 5-2 victory over Martin Adams.
The PDC world number one was below his best against the three-time Lakeside champion but he was still able to come through with a comfortable win.
Phil Taylor also made a positive start to the tournament with a 5-1 win over Darryl Fitton, but Adrian Lewis was stunned by Scott Mitchell, who ran out a 5-1 victor in Wolverhampton.
Gary Anderson edged a last-leg decider with BDO number one Glen Durrant, while earlier in the day, Raymond van Barneveld averaged over 110 in defeating Nathan Aspinall.
The other stand-out results from Saturday's play saw James Wilson defeat Dave Chisnall by a 5-2 scoreline, and Mensur Suljovic losing 5-3 to Danny Noppert.