Lobi Stars claimed a first league win over Sunshine Stars since August 2013 on Wednesday at the Aper Aku Stadium
The forward opened scoring for his side in the 13th minute, with Emmanuel Sunday grabbing the equaliser for the visitors in the 68th minute.
Okpotu restored the hosts’ lead two minutes later when he scored the winner.
Abia Warriors are in third place after they defeated El-Kanemi Warriors 2-1. Nigeria international Chisom Chikatara scored on four minutes for Abia Warriors before Mustapha Ibrahim equalised five minutes later.
The Umuahia club, which had to play with a man advantage for almost an hour after El-Kanemi’s Alex Otakho was sent off for a second bookable offence, got the winner in the 81st minute through substitute Michael Olaha.