Siya Kolisi: Breakdown battle and discipline key in 'as big as it gets' clash against Ireland

South Africa's Rugby World Cup Pool B clash with Ireland in Paris on Saturday is as big as it gets according to captain Siya Kolisi, while coach Jacques Nienaber knew their 7:1 bench "innovation" would get a negative response.

Andy Farrell's side are on a run of 15 straight victories and beat the Springboks 19-16 when they met in Dublin last November, with this battle likely to decide the top team in the group in France.

"We took a lot from the last match we played against them," Kolisi told reporters on Thursday. "And both teams are playing well, so this is a good time to face them.

"We want to play nice, competitive rugby and I believe the match will be tough and played in a good spirit. This is as big as it gets."

The breakdown battle and discipline are two areas Kolisi believes will go a long way to deciding the outcome of the contest.

"The breakdowns are going to be big. They have a lot of players who are effective in that department and I think that will have a big influence on the game," the Bok skipper said.

"If you concede penalties against a team like Ireland they’ll either get territory or points, so they’ll put us under pressure. We must be disciplined to get the right result."

Nienaber raised eyebrows when he selected seven forwards on the bench, which has promoted an outcry from some pundits as being against the spirit of the game.

It is an attempt to make the Boks effective in the forwards, especially at the breakdown and with quick ruck ball, for the full 80 minutes.

"Innovation in any sport will trigger a reaction," Nienaber said. "This is the first time it’s been done in rugby and that will come with a positive and negative reaction, but nothing is stopping other teams from doing it.
"It would be a sad day if