Tomane, as he is more commonly known, produced an instinctive toe-poked finished to prod past the advancing Vid Belec in the Olhanense goal to settle the game with just five minutes played after latching on to Rafael Crivellaro's inch-perfect pass.
The third league goal of Tomane's proved the difference as Rui Vitoria's Guimaraes side boosted their European hopes with a win that saw them leapfrog Nacional and Estoril into fourth, seven points behind Porto.
Defeat for Olhanense denied them the chance to haul themselves out of the bottom two.
And a frustrating night was compounded when defender Abdoulaye Ba was given his marching orders for two bookable offences.
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