Form and context

FC Porto lead the Primeira Liga with a perfect 27 points from nine matches, the club's best start to a league season in more than 86 years. Estoril are bottom, 18th with just two points and the only side without a win in the competition this season. The visitors are being led on an interim basis by Sérgio Raimundo, promoted from the under-23 side after Vasco Matos left two weeks ago.

Team news

• FC Porto: Samu Aghehowa and Zaidu Sanusi were left out of the squad for the midweek Taça da Liga game as a precaution, with no new injuries announced for either. Chris Smalling suffered a knee ligament injury against Académico de Viseu and could miss several games. Vasco Sousa (conditioned training), William Gomes (treatment and gym) and Oskar Pietuszewski (treatment) remain on the clinical bulletin, and Farioli has set no return dates for Gomes or Pietuszewski.
• Estoril: No confirmed team news yet.

What the numbers say

• Porto have won nine straight league games and are chasing a 10th.
• In all competitions, Porto's last five read: 1-0 win at Gil Vicente, 0-1 home loss to PSV Eindhoven, 3-2 loss at Real Betis, 2-1 win at Maritimo and 3-1 win over Benfica.
• Estoril's last five in all competitions: 1-3 home loss to Moreirense, 2-1 loss at Académico Viseu, 1-2 home loss to Casa Pia, 1-0 loss at SC Braga and a 0-0 home draw with Arouca.
• Porto have won four of the last five head-to-head meetings, with Estoril winning the other.

Our view

Porto's league form is relentless, and even with rotation and Smalling's absence, the gap between the sides is wide. Estoril have scored just 0.6 goals per game across their last 10 matches in all competitions, which makes an upset hard to picture.

Most likely outcome: home win - Porto's nine-match league winning run against a bottom side still without a victory.