Wales won its third straight game at the Rugby World Cup, holding on to beat Fiji 23-13 on Thursday and move to the brink of qualification from Pool A.
The Welsh will be guaranteed a spot in the quarter-finals if England loses to Australia on Saturday. The English would then be eliminated from their home tournament.
On a five-day turnaround from a memorable 28-25 win over England, Wales held up well against Fiji's adventurous, dynamic game and led 17-6 at halftime through tries from Gareth Davies and Scott Baldwin.