Not perfect but New Zealand pleased with discipline

YOKOHAMA, Japan Sept 21 (Reuters) - New Zealand were never going to be perfect on day two of the World Cup, coach Steve Hansen said after Saturday's 23-13 Pool B victory over South Africa but he and captain Kieran Read were encouraged by their side's defence and discipline.

Two tries in four brilliant minutes proved the difference in the Pool B opener but the holders struggled to find much rhythm and had to ride out a brief Springbok scare in the second half.

"We won, didn't we? So you've got to be happy with that. Were we perfect, no but you're never going to be at this stage of the tournament. You're not in the swing of the tournament and right from the get go you've got the biggest game possibly of the group," Hansen told a news conference.

"There is plenty of stuff we can work on. The boys showed a lot of fortitude, we didn't get too many opportunities and we took them when they came and we scrambled really well when they had opportunities themselves. Both those areas are really important to us."

Hansen highlighted flyhalf Richie Mo'unga's potential "match winner" of a cover tackle on the electric Cheslin Kolbe, just after South Africa had cut the deficit to one score in the second half.

With two staunch defences going head to head in a game that produced only 12 combined line break, Hansen said it was a case of having to take what you are given and for New Zealand that was two stunning breakaway tries.

"It was really hard early in the game for us, our set-piece wasn't as nice as you'd expect it to be and therefore you can't have a platform to strike off. The boys adjusted okay and as the game got on, they started to get a bit more fluid with it," he said.

"It's an area that we're just continually working on, we're making progress but you can't strike if you don't get TQB, which is top quality ball at the set piece."

South Africa coach Rassie Erasmus said discipline was one of the big differences after his side conceded over twice as many penalties, something Read said the three-times champions had been working on.

"Discipline was always going to be a massive thing for us, South Africans love to build pressure through those penalties. It was a conscious decision from us to make sure we didn't give away too many penalties," the Kiwi number eight said.

"We probably haven't been as smart throughout this whole year but tonight we were certainly at a different level." (Reporting by Padraic Halpin, editing by Ed Osmond)