Having beaten Samoa on Saturday, the young Dragons followed up with a consummate victory over the Fijians with Ospreys and Aberavon outside-half Matthew Jarvis helping himself to 14 points.
Jarvis put Phil Davies’ side six points to the good with two penalties inside 10 minutes and, though Josh Matavesi popped over Fiji’s only penalty, Wales improved their position courtesy of a try from centre Ben John – also Aberavon and Ospreys academy – and a conversion and penalty from Jarvis.
Pontypool’s Morgan Allen crossed for a try after 24 minutes and, with Fiji down to 13 men with Kolinio Nalasekata and Emosi Ugavule in the bin, Wales took control and led 21-3 at the interval.
The second half was a carbon copy of the first with Wales on top courtesy of an excellent all round effort despite the physical challenge posed by the South Sea islanders.
Jarvis kicked his fourth penalty to improve Wales’ lead and Asley Beck made sure with a try and conversion in second-half injury time.
Wales play title holders New Zealand in Santa Fe on Sunday in their final Pool encounter.
Wales scorers:
Tries: Ben John, Morgan Allen, Ashley Beck
Cons: Matthew Jarvis, Steve Shingler
Pens: Matthew Jarvis (4)
Wales Under 20:
Dan Fish; Kristian Phillips, Ben John, Scott Williams (Ashley Beck 65), James Loxton; Matthew Jarvis (Steve Shingler 74), Gareth Davies (Rhys Downes 65); Dan Watchurst (capt), Ieuan Davies, Joe Rees (Will Taylor 56), Lloyd Peers (Joel Galley 67), James King, James Thomas, Josh Navidi (vice-capt), Morgan Allen (Rhys Jenkins 65)