[BY THE NUMBERS]The 2010 World Cup produced 22 goals in the round of 16, well above the all-time low set four years ago but very close to the average number of goals scored in that phase of the competition since the format was introduced at the 1986 tournament.
In 1982, 12 of 24 teams advanced to a second phase of group play. FIFA then changed the format to accommodate 16 teams in a knockout round. (FIFA increased the number of participating countries to 32 in 1998.)
Along with the total goals scored in the eight matches of that round, the chart also shows how many games went to overtime and of those, how many were decided by post-game penalty kicks.
Only seven matches have been decided by penalties of the 15 that have gone into overtime.
Ghana beat the USA, 2-1, in overtime on Saturday; Paraguay beat Japan on penalties, 5-3, Tuesday after 120 minutes of scoreless play.
ROUND OF 16 GOALSCORING
Key:G=goals; avg.=goals per game; OT=overtime games; SO=games decided by shootout.