Shaun Edwards has defended under-fire coach Rob Howley by insisting Wales' autumn campaign will be judged on how they fare against South Africa on Saturday.
Wales have not claimed three autumn victories since overcoming Japan, Canada and Romania in 2002.
Howley's side are in position to do that after bouncing back from their opening defeat to Australia with narrow wins over Argentina and Japan.
But the nature of Saturday's 33-30 victory over Japan - they won it when Sam Davies landed a drop goal with nine seconds left - has led to questions over where this Wales team is heading with Warren Gatland currently away on British and Irish Lions leave.
"You know when you are in this position as a national coach, you have to block everything out," defence coach Edwards said. "You continue doing your job, what you are trying to do.
"Rob has only been in one Six Nations [when Gatland was on a similar sabbatical ahead of the 2013 Lions tour to Australia] and he has won it.
"He has a 100 per cent winning record, he is an excellent coach with his attention to detail."
Wales have only won two and drawn one of their previous 31 matches against South Africa who arrive at their lowest ebb in years, losing six of their last seven matches, the latest of which was their first ever defeat to Italy.
But Wales triumphed when they last met in Cardiff two years ago, with Leigh Halfpenny kicking four penalties in a hard-fought 12-6 victory.
"The success or relative failure [of the autumn] will depend on whether we win on Saturday," Edwards said.
"It's been said in the past we've played Australia many times and lost by one point. We've played fantastic, but we've lost. It's all about winning and we've won two tight games.
"Have we played as well as wanted to on Saturday? No, we didn't. But we're going into a cup final this week against a team ranked higher than us and they've got what we want, which is that fourth ranked position."
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