The Owls boss believes his countryman could be a real threat when the pair meet in the Championship on Saturday.
Sheffield Wednesday boss Carlos Carvalhal has seemingly singled out Nelson Oliveira as the man that the Owls will have to stop if they hope to get a positive result against Nottingham Forest at the City Ground on Saturday, the Sheffield Star reports.
The Portuguese - who is on loan from Benfica - is Forest's top goalscorer in the Championship this term, but Carvalhal insisted that his countryman has been on his radar for a long time, and thus, he is aware of the impact he could have on the game.
"He played fantastically in the Under-21's European Championship tournament a few years ago but he didn't progress like everybody expected," he told the Star.
"His potential has always been there and he has played well this year."
Although the 24-year-old's nine goals easily makes him Dougie Freedman's side's largest goalscoring threat - and therefore, Carvalhal will be urging his defenders to try and keep the forward quiet - Wednesday's biggest concern is surely not keeping the opposition at bay, but rather scoring goals themselves.
The Owls have not won any of their last five games, and while they have only conceded three goals in that time, they have only managed to score once in that run.
But while Wednesday's squad will be looking to be more ruthless going forward, Carvalhal will be reminding his players that they also need to pay plenty of attention to the man that will be looking to extend the Owls' winless run to six games.