Mexico will have 5 pts in that case, Brazil and Croatia 4 pts both. Brazil currently has (3-1; 0-0) +2 goal difference (3-1 total) while Croatia has (4-0; 1-3) +2 (5-3 total). with a draw against Mexico, Croatia will keep +2 while Brazil, even with a 1-0 loss will have a goal difference of +1. so Croatia goes throught by goal difference regardless of how high Brazil would eventualy lose...