The Nigeria international's effort could not prevent the Smurfs from losing to the Ukrainian topflight side on Tuesday night
Paul Onuachu was on song for Genk as they suffered a 2-1 defeat to Shakhtar Donetsk in Tuesday’s Champions League fixture.
In the first leg of the third qualifying round played at the Luminus Arena, the Nigerian put the Smurfs ahead, albeit, the Ukrainians bounced back to secure victory.
Genk came into the fixture on the back of a 4-3 defeat to KV Oostende in a league game on Friday.
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For the visitors, they travelled to Belgium having silenced Lviv 3-0 their last time out.