Fly-half Dan Biggar believes the result against South Africa on Saturday will determine the final verdict on Wales' autumn international campaign.
Wales started their November Tests with a 21-29 defeat to Australia and followed it with an unimpressive 13-6 victory over Georgia before losing to New Zealand 18-33 last weekend.
Warren Gatland's side will face the Springboks in the final game of the extended season at Principality Stadium and Biggar believes the result will be vital to their morale ahead of the 2018 Six Nations tournament.
"If the scoreboard is in South Africa's favour, we will all have to admit it has probably been a poor autumn in terms of everything.
"But if we get a win, backed up against the performances against Australia and New Zealand, I think it will be a pretty decent autumn and will build in nicely to the Six Nations and the (2018) summer tour.
"It's massively important, and the only thing that matters, really, to us as a squad is to make sure we are winners on that field on Saturday rather than being positive about playing well, but not quite getting over the line.
"I always say you've got to be judged by results, and we have been disappointed with the results against Australia and New Zealand.
"But we have shown lots of positive signs in the way we play, and naturally if you are going to change your style and evolve in how you are playing, it's going to take time to get used to combinations and you have to find out things about yourselves.
"When we've got teams under the pump, which we have done this autumn, we have to make sure we don't take our foot of the throat, try to wear teams down and be a little bit more clinical.
"In terms of physicality and the size of their men, generally they (South Africa) are the toughest opponent.
"We need to toughen up at the weekend, and it's about not doing the pretty things, (but) knuckle down and get your boots dirty and front-up. We need to stop them, and if they get a roll on, it's a tough day."
Saturday's game is vital from Biggar's point of view as he will making his 60th Test appearance - the cap set by the Welsh Rugby Union for the players plying their trade outside Wales to be considered for national selection.
The 28-year-old has already announced his decision to move to Aviva Premiership club Northampton Saints next season from Ospreys and his selection for Wales is unlikely to be affected by it.
"We should call it the Dan Biggar Game!" Biggar added.
"It's one of those things. Just because you get to 60 caps doesn't mean that you are going to get picked for Wales forever and ever if you leave.
"But it obviously will mean that door is still open for me when I leave next year. It's nice to get that out the way as quickly as possible, so injury, form or whatever is out of the window. I can just concentrate on playing now."