Gethin Jenkins stresses the need for Wales to keep building momentum
Gethin Jenkins has stressed the need to keep building momentum after Wales moved to within touching distance of booking a second successive World Cup quarter-final appearance.
Wales will be through - and England will crash out - if Australia beat the host nation at Twickenham on Saturday.
Although much of Wales' 23-13 Pool A victory over Fiji at the Millennium Stadium was not pretty, first-half tries by Gareth Davies and Scott Baldwin - plus 13 points from Dan Biggar - saw them home.
It followed earlier wins against Uruguay and England, and leaves Wales with an outstanding chance of reaching the knockout phase.
"Fiji are a very good team, and we are glad to come away with a win," Wales prop Jenkins said.
"It was a big high (beating England at Twickenham) last Saturday, and we knew it was going to be tough to back up today. We are glad to get off there with a win.
"The big challenge for us was to mentally get back up after what happened last weekend. I thought we did that quite well.
"We set our stall out early doors, but physically it was tough, especially the second half. I am just glad we held on in the end for a win.
"We have got a couple of days to rest up now, and then it will be into a full Test week before playing Australia. We will get our heads back on when we get back in.
"Even though we have won three out of three, we can probably go up again in terms of our performance.
"We've had a lot of tight games against Fiji, and some of the backs they have got are playing in quality teams in France and all over Europe.
"We knew they were going to come and throw the ball about, which is why we had to be alert for the whole 80 minutes in defence.
"If they (Australia) win on Saturday, it takes a little bit of pressure off going into that last game, but I am sure 'Gats' (Wales head coach Warren Gatland) and the coaches will want us to go full-hit against Australia and try to get that victory.
"We've had a couple of injuries which have maybe set us back a little bit, but I feel we are building, and now we have to keep trying to build the momentum.
"I suppose the team that wins the World Cup is the one that keeps building on each performance."
As at Twickenham, though, Wales' main area for concern proved to be the scrums, where Fiji enjoyed dominance.
Jenkins added: "That was one of the best scrums we have come up against in a long time.
"They didn't surprise us. We knew how they scrummaged against England, and how good they are in that area.
"We have got a bit of work to do in that area, and we are not going to shy away from that."
Wales, having lost five of their original 31-man World Cup squad through injuries, did not appear to suffer any major problems in that department against Fiji, although lock Bradley Davies had his right ankle encased in an ice pack after the game.