Porto's unbeaten league campaign continued with a comfortable 2-0 win at home to Estoril on Friday.
Two goals in the opening 15 minutes from Maicon and Jackson Martinez handed Porto maximum points after their disappointing goalless draw against Sporting Lisbon last week.
Porto hit the front inside four minutes when Maicon outjumped his opponent to powerfully header home a James Rodriguez corner.
It went from bad to worse for the visitors 10 minutes later after the referee pointed to the penalty spot for a handball inside the area.
Martinez stepped and made no mistake, converting his 13th goal in 10 league and cup games.
The result never looked beyond doubt from that point as Vitor Pereira's men eased to their 17th victory of the campaign.