Japan coach Eddie Jones believes Wales can beat South Africa in their World Cup quarter-final clash on Saturday - and has even told them how to do it.
Jones guided Japan to one of sports' greatest upsets by beating South Africa 34-32 in Brighton in their opening match of the tournament.
The Brave Blossoms did not qualify for the last eight - they became the first team to win three games in the pool stages and fail to advance.
Writing in the Daily Mail, Jones revealed the tactics he would use to beat the Boks, and he highlighted two South Africans the Welsh need to target if they want to reach the semi-finals.
The first is fly-half Handre Pollard, the other scrum-half Fourie du Preez - disrupt them, Jones believes, and Wales can win.
"If I were Warren Gatland then I would be sending Jamie Roberts in hard on fly-half Handre Pollard as much as possible," he wrote.
"Pollard's a brave guy but he's not a dominant tackler. So if Wales send in Roberts they can gain line momentum relatively easily, but Wales have to go with pace and precision to succeed.
"Damian de Allende at 12 is a very good player but he's quite an inexperienced Test player. If Wales attack Pollard then De Allende will want to defend tighter. That may end up opening a few gaps, which would give Wales the opportunity to play wider and find spaces to exploit in midfield
"Fourie du Preez started on the bench when we beat South Africa but now he is back in the line-up, he is the heart and soul of this Springbok team.
"From scrum-half he runs all their tactics, he gets their forwards on the front foot and he's got a superb kicking game. And you watch how many times he will take the high ball in defence, he almost plays like a second full-back. He lacks that lightning acceleration he had when I was working with him in 2007 but he's an extremely experienced, smart player and Wales have to hassle him as much as possible.
"The flankers must take any opportunity they can to get off their line and deny him space. If you take away a half-back's time and space then they can get flustered.
"If Du Preez dominates then I think South Africa will win comfortably. But if Wales can disrupt him, they will have a chance."
