2011 Rugby World Cup knockout stage

The knockout stage of the 2011 Rugby World Cup began on 8 October with a quarter-final between Ireland and Wales and concluded on 23 October with the final at Eden Park in Auckland.

New Zealand were the first team to qualify for the knockout stage, when they beat France 37–17 in their penultimate Pool A game. New Zealand and France re-encountered in the final, that was won by the local team 8–7. This was a rematch of the 1987 final, also in Eden Park and also won by New Zealand. This way, New Zealand got their second title, while France their third final.

For the first time in World Cup history, three teams that finished second in their respective pools qualified for the semi-finals, while South Africa became the second defending champions not to reach the semi-finals after Australia in 1995.

Furthermore, the bottom half of the bracket was entirely composed of the 2012 Rugby Championship teams and the other half was composed of the last four Six Nations champions since the last World Cup.

New Zealand vs Argentina
Notes
 * This was New Zealand fullback Mils Muliaina's 100th test, the second New Zealand player to have reached this milestone.

Wales vs France
Notes
 * The Welsh captain was sent off after committing a tip-tackle, releasing the opponent past the horizontal off the ground in the 18th minute.

Wales vs Australia
Notes
 * This was Australian lock Nathan Sharpe's 100th test, the fifth Australian to reach the milestone.