The hosts, on the other hand, are 10th in the Primeira Liga with five points from four games and could move into the top half of the table with a win.
Match preview
Vitoria de Guimaraes made it three games without defeat when they held a rampant Braga side to a goalless draw at the Estadio Municipal de Braga last time out.
Czech Republic goalkeeper Matous Trmal put on a clinic between the sticks for Os Vimaranenses as he made a plethora of saves to deny the hosts their second win on the trot.
This followed an emphatic 4-0 win over Vizela three weeks ago, where Andre Andre, Oscar Estupinan, Marcus Edwards and Falaye Sacko all scored in the second half to cap off a superb team performance.
Sunday's hosts are now unbeaten in seven of their last eight games in all competitions, picking up six wins and one draw while scoring 13 goals and conceding four.
Pepa will fancy his side's chances of keeping up their solid form as they welcome an opposing side who they are unbeaten against in six of the last seven home meetings between the sides.
Belenenses, meanwhile, picked up their first point of the new season courtesy of a 1-1 home draw against fellow strugglers Moreirense last time out.
In a game where Trova Boni received his marching orders, O Belem looked set for all three points after Nigerian defender Chima Akas put them ahead shortly before the half-hour mark, but substitute Andre Luis struck with four minutes remaining in the game to salvage a point for the visitors.
Prior to that, Belenenses suffered defeats against Porto, Maritimo and Sporting Lisbon as they failed to pick up a point from their opening three league outings for the first time since 2013.
Petit's side have now failed to taste victory in each of their most recent nine games across all competitions and this has been down to their woeful display at the attacking end of the pitch where they scored just four goals in that time.
Vitoria de Guimaraes Primeira Liga form:
Vitoria de Guimaraes form (all competitions):
Belenenses Primeira Liga form:
Belenenses form (all competitions):
Team News
Vitoria remain without the services of first-choice goalkeeper Bruno Varela who has missed the last seven games through a knee injury.
In his absence, Matous Trmal has been in sensational form for Os Vimaranenses, making nine saves and keeping three clean sheets from the opening four games and we expect the 22-year-old goalkeeper to stand behind an unchanged back four of Falaye Sacko, Toni Borevkovic, Abdul Mumin and Rafa Soares following their valiant display against Braga last time out.
Meanwhile, Belenenses will be unable to call upon the services of midfield duo Afonso Taira and Trova Boni, who continue to serve their suspensions after picking up straight reds against Sporting Lisbon and Moreirense respectively.
Sandro and Pedro Nuno will also sit out the tie, with the latter coming off injured just before half time last time out, while Mateo Cassierra is a major doubt after missing the last two outings.
Rafael Camacho could be handed his first starting appearance of the season after impressing off the bench for the injured Nuno against Joao Henriques's men.
Portuguese manager Petit will only be allowed to watch from the stands on Sunday after receiving a red card in the aforementioned game and in his absence, assistant coach Jose Pedro will take over the reins.
Vitoria de Guimaraes possible starting lineup:
Trmal; Sacko, Mumin, Borevkovic, Soares; Almeida, Semedo, Andre; Rochinha, Estupinan, Quaresma
Belenenses possible starting lineup:
Felipe; Carraca, Ribeiro, Phete, Akas, Varela; Camacho, A Sousa, Coelho, C Sousa; Ndour
We say: Vitoria de Guimaraes 1-0 Belenenses
Both sides have had contrasting starts to the season, with Belenenses struggling to get going. We anticipate Vitoria will come away with all three points as they appear to have hit their stride this term and take on an out-of-sorts Belenenses side.