The following table indicates the pairings in the round of sixteen of the World Youth Championship Nigeria '99. They depend upon which teams qualify from third place in the first-round groups. For example, if the teams finishing third in groups A, B, C and D qualify, the pairings will be A1 vs C3, B1 vs D3, C1 vs A3 and D1 vs B3.

Combinations A1 plays against: B1 plays against: C1 plays against: D1 plays against
A B C D C3 D3 A3 B3
A B C E C3 A3 B3 E3
A B C F C3 A3 B3 F3
A B D E D3 A3 B3 E3
A B D F D3 A3 B3 F3
A B E F E3 A3 B3 F3
A C D E C3 D3 A3 F3
A C D F C3 D3 A3 F3
A C E F C3 A3 F3 E3
A D E F D3 A3 F3 E3
B C D E C3 D3 B3 E3
B C D F C3 D3 B3 F3
B C E F E3 C3 B3 F3
B D E F E3 D3 B3 F3
C D E F C3 D3 F3 E3