Cristhian Stuani scored twice at the Camp Nou on Sunday to hold a 10-man Barcelona side to a 2-2 draw.
Lionel Messi opened the scoring after 28 minutes, but a quarter of an hour later Clement Lenglet was sent off after a VAR review for catching Pere Pons with an elbow in a collision between the pair.
Stuani netted on the stroke of half-time, controlling a cross and showing good strength to power between Gerard Pique and makeshift centre-back Sergio Busquets before slotting home.
The Uruguayan found the net again five minutes after the break, rifling into the top corner after Marc-Andre ter Stegen had denied Portu, but Pique atoned for his earlier error to head home an equaliser in the 63rd minute.