The victory keeps Nigeria’s hope alive for the 2026 FIFA World Cup qualification.
South Africa lead Group C with 16 points, followed by Benin with 11 and Nigeria with 10.
The Super Eagles currently sit fourth in Group C with seven points, trailing South Africa, Rwanda and Benin Republic.
Mr Chelle described the Unity Cup as his first trophy as a coach despite winning several as a player.
The coach expressed delight at the team’s win over Rwanda but stressed the need for improvement ahead of their next game on Tuesday.
Nigeria is second from bottom with three points from four matches, with Zimbabwe languishing at the bottom of the six-team log.
Nigeria will confront group C leaders Rwanda in Kigali on March 21 before taking on Zimbabwe’s Warriors at the Godswill Akpabio Stadium, Uyo, Akwa Ibom State, four days later.
