Home-based Super Eagles came from behind to beat Angola 2-1 and zoom into the semi-finals of the ongoing African Nations championship in Morocco.
Angola were almost running away with victory when Nigeria equalised in injury time to take the encounter to extra-time.
After a goalless first half, Angola opened scoring in the 56th minutes through Va and held on after normal time before the Eagles equalised.
Okpotu equalised for Nigeria on two minutes of the three minutes added time. It was a deserved goal after the Eagles had mounted pressure on the Angolan defence.
Poor finishes in front of goal had been the Eagles bane. They could have won the match easily if they had taken their chances.
Okechukwu gave Nigeria the victory when he scored the winning goal in the 111th minute of extra-time to put the game beyond the Angolans.