Moreirense are enjoying the current campaign after picking up 17 points from their opening 14 games to leave them lying in seventh position.
Although Vitor Campelos has seen his side score just 11 times in the Portuguese Primeira Liga this season, Os Verdes e Brancos have one of the best defensive records in the division.
Despite their relatively high league standing, a defeat on Sunday could drag Moreirense back into the relegation mix, given the tight and congested nature of the league.
Campelos will be seeing the visit of a side five places below them as a perfect opportunity to put some daylight between his team and the bottom three.
The visitors have come into some good form of late, winning two of their last three Primeira Liga encounters.
A narrow victory on Sunday elevated them to 12th in the table, although they remain just two points above the relegation playoff place.
Much like their upcoming opponents, Portimonense's problems in 2020-21 have been in front of goal.
They have found the back of the net on just 10 occasions this season, something that will have to change if they are going to successfully avoid the drop.
Three goals in their last three outings and two clean sheets will give them confidence coming into this one, though, and a convincing victory could see them leapfrog Moreirense in the league standings.
Moreirense Primeira Liga form: DDWLDW
Moreirense form (all competitions): DWLDLW
Portimonense Primeira Liga form: LDLWLW
Moreirense have several first-team players unavailable through injury, leaving Campelos with limited options to choose from.
Portimonense are one of many Portuguese teams to have a player test positive for COVID-19.
Moreirense possible starting lineup:
Pasinato; Ferraresi, Pacheco, Rosic; Figueiredo, A Soares, F Soares, D'Alberto; Pires, Silva, Santos
Portimonense possible starting lineup:
Ferreira; Moufi, Antonio, Possignolo, Anzai; Luquinhas, Willyan, Dener; Morte, Moreira, Oliveira
We say: Moreirense 1-1 Portimonense
This is likely to be a low-scoring affair with few chances conceded by either side, whose strengths lie in defence. We fancy them to take home a point apiece which would satisfy both teams.