Ghanaian international Lawrence Ofori came off the bench to register the match-winner for Arouca in their 2-1 win at UD Oliveirense.
The on-loan player replaced Pedro Moreira in the 72nd minute and scored just after four minutes.
It was his first goal for the club he joined from Portuguese top-flight side Famalicão on a season-long loan.
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Ofori, 22, has previously played for Leixões, Feirense and Famalicão