The 26-year-old Nigeria international headed home off from Theo Bongonda free-kick after just seven minutes before Genk was reduced to 10-men after Carlos Cuesta red card five minutes later.
✅ 21 matches
✅ 20 buts
— Eleven Sports (FR) (@ElevenSportsBEf) January 21, 2021
However, Roman Yaremchuk drew Gent level in the stoppage-time of the first half.
Onuachu did not last long on the pitch as he was replaced in the 31st minute while his fellow Super Eagles compatriot Cyril Dessers and Ivory Coast’s Eboue Kouassi were introduced as 85th-minute substitutes.
Onuachu has now scored 20 league goals as he extends his lead in the race for the golden boot with his closes challenger Thomas Henry four adrift Nigerian striker.
The draw saw Genk remain in the second position nine points behind leaders Club Brugge.
Onuachu and Dessers’ Genk is a league trip to Emmanuel Denis & David Okereke’s Club Brugge on Sunday after which they host Zulte-Waregem at the Luminus Arena on January 27.