Sykes powers Dewsbury to Lions triumph
The Rams star crossed for two tries, while also chipping in with six goals.
The hosts led 22-0 at half-time, but held off a fightback from Swinton.
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Hide AdOther Dewsbury try-scorers included Joel Farrell, Lucas Walshaw, Josh Guzdek and Dom Speakman.
Macauley Hallett, Josh Barlow, Mike Butt and Rhodri Lloyd replied with tries for Swinton, Chris Atkin adding four goals.
Dewsbury: Guzdek, Morton, Sykes, Crookes, Uaisele, Speakman, Kain, Groat, Hemingway, Stringer, Hale, Walshaw, Trout. Substitutes: Brown, Jackson, Farrell, Spicer.
Swinton: Atkin, Robinson, R. Lloyd, Hallett, Butt, White, Beharrell, Fleming, Barlow, Emmitt, Dwyer, Thornley, Lever. Substitutes: Bracek, Johnson, Hand, Waterworth.
Referee: C Kendall (RFL).