Nigerias one of six teams playing today in Russia
Brazil and Costa Rica meet today to open up Day 9 of the World Cup.
The Brazilians want to do one better this time around after opening their tournament with a draw against Switzerland.
Later, Iceland can shock the world if they beat Nigeria to advance to the knockout stage. And the Swiss face Serbia.
Yesterday, Croatia advanced to the knockout round while putting former champion Argentina on the brink of elimination.
The Croatians scored three times in the second half to beat Lionel Messi and Argentina, 3-0.
France advanced to the round of 16 with a 1-0 victory over Peru.
Australia stayed alive with a 1-1 draw against Denmark.