Steve Hansen fears tackle red cards could swing World Cup knockout games

• ‘We all know what the guidelines are and have to work harder’• We are expanding our coverage of New Zealand. Please help us by supporting our independent journalismSteve Hansen fears matches in the World Cup knockout stages could swing on a red card for a high or dangerous challenge, but he believes it would be a price worth paying to lower the height of tackles.The New Zealand head coach saw two of his props sent to the sin-bin for making contact with the head of an opponent who was low to the ground during the victory against Namibia on Sunday, while Australia received two yellow cards for…