Olusegun's first-half penalty was enough to see a wasteful Golden Eaglets side to the semis of the Afcon U17, and an early World Cup spot in Brazil
Nigeria U17 are through to the Brazil 2019 Fifa U17 World Cup after defeating 10-man Angola U17 1-0 at the National Stadium, Dar Es Salaam on Wednesday.
Heading into the clash, either side stood the chance of securing a semi-final spot - and a ticket to the World Cup - with a win after their feats in their Group A openers.
Manu Garba's men endured a stern test from hosts Tanzania, defeating them 5-4 while their Angolan counterparts saw off Uganda 1-0.