But Warburton does not rule out change further down the line if Wales are defeated.
“It is a massive game for Wales,” Warburton told the Rugby Union weekly podcast.
“If they lose, you imagine behind closed doors the WRU board and CEO getting together and saying ‘what is the plan’ because this is getting bad.
“The consequences could be the biggest we have had in 15 years meaning maybe players and coaches, there could be a clean sweep.
“There could be players, where they say we have tried all these combinations, where they say he is just not a Test player.
“With the coaching staff, they would be 14 in a row if they lose next week and that then could be 17 in a row.
“Potentially they are staring down the barrel with Ireland and England at home and Scotland away, so it’s going to take a massive performance to win one of them.”
Another former captain Dan Biggar described this weekend as the most important in Welsh rugby for 15-20 years.
Warburton says “I don’t think it’s their biggest game” with Wales playing for Grand Slam titles and in Rugby World Cup semi-finals during that period.
“I think what Dan meant was the consequences could be some of the biggest in the last 15 years,” said Warburton.
“If they lose that game, they’ve then got Ireland, Scotland and England.
“It’s tricky to see where the win is going to come, I think that’s why people are pinning so much pressure on this game.”
