The knockout stage of the 2009 FIFA Confederations Cup began on 24 June and concluded on 28 June 2009 with the final at the Ellis Park Stadium, Johannesburg. It was the second and final stage of the 2009 FIFA Confederations Cup, following the group stage. The top two teams from each group (four teams in total) advanced to the knockout stage to compete in a single-elimination style tournament. A third-place match was included and played between the two losing teams of the semi-finals.
In the knockout stage (including the final), if a match was level at the end of 90 minutes, extra time of two periods (15 minutes each) would be played. If the score was still level after extra time, the match would be decided by a penalty shoot-out.