Wales boss Warren Gatland opened up on his reasoning behind selecting Ospreys forward James King at number eight against Uruguay.
King typically plays as a lock or flanker, and has won five caps for Wales since his debut against Japan in 2013.
“We took the decision to rest a few other players," Gatland explained.
"We have had Taulupe (Faletau) there and he takes part in all the training sessions and doesn't get injured very often.
"But we needed to make sure we had some cover in that position. I think there are three or four players who can cover there, but I think it was important that he started there.
"We also have Ross Moriarty who can play there.”
As for the match itself, Gatland's only focus is on Wales coming away with a victory given he doubts Pool A will come down to points difference in the race for the quarter-finals.
“We just want to win. I don't think the group is going to come down to points difference. We have got to go out there and first, win the game. After that, potentially, it's about scoring points. It's not about disrespecting Uruguay in any way.
"We have got a short turnaround to next week's game against England, so we have mixed and matched a little bit this week in terms of the way we have done things.
"Some of the focus has been on England and the latter part of the week has all been on Uruguay.”