Nduka Ugbade has admonished the Golden Eaglets to work hard after suffering a 1-0 defeat against Morocco on Wednesday.
The defeat put the qualification of the two-time champions into the quarter-finals at the ongoing 2023 Africa U-17 Cup of Nations on hold.
This means that the Eaglets must win the contest against South Africa on Saturday to book a place in the last eight.
Asked what his side must do to come out victorious against their next opponent, Ugbade said: “We must be more efficient with the chances we have.
“We will try to look for some different ways tactically to impact the outcome of the game.
“We have a chance, but also, that chance can fade away. We have to work hard.”