PARIS (AP) -- Marseille humbled newly-promoted side Guingamp 3-1 in the French league on Sunday, with new signing Dimitri Payet scoring twice on his debut.
It was a dismal return to the top flight for Guingamp, which finished runner-up to Monaco in Ligue 2 last season, as it found itself 3-0 down after a quarter of an hour following several defensive mistakes.
Andre-Pierre Gignac scored an early opener for Marseille before a swift double for Payet, who was signed from Ligue 1 rivals Lille in the offseason.
Guingamp had a chance to get back into the game early in the second half but Mustapha Yatabare saw his penalty saved after Souleymane Diawara was harshly adjudged to have fouled Steeven Langil.
However, Marseille was eventually made to pay for its frailty in defense - which will be of concern to coach Elie Baup - as Yatabare scored in the 74th minute.
Earlier, Saint-Etienne strolled to a 1-0 win at Ajaccio as Fabrizio Ravanelli's first match in charge of the Corsican side ended in disappointment.
"We did very well in the first half, we could have even scored a fourth or a fifth goal,'' Baup said. "Then it became more difficult, and we left a lot of open spaces for our opponents. There are a lot of things to correct but it's good to have started by scoring three goals.
"It's normal, it's only the first match, there's a lot of work to be done but I saw good things in our attacking approach and the way we kept the ball. There's quite a few things to correct in defense. But everything's going well. As long as there are goals, it's good. We had chances, goals. Everyone's finding their feet again.''
Marseille, which finished runner-up to Paris Saint-Germain last season, got off to a perfect start as it was gifted the lead in the second minute.
Andre Ayew's shot was parried by Guingamp goalkeeper Mamadou Samassa but straight to the feet of Gignac, who drilled the ball into the empty net.
The visitors doubled their lead less than two minute later, with Payet slotting into the bottom left corner after Guingamp midfielder Christophe Kerbrat failed to deal with Ayew's cross.
Payet grabbed his second of the game in the 16th minute. Benjamin Mendy's cross eluded everyone and went out to Mathieu Valbuena on the far right of the penalty area. Samassa parried his shot but the defense failed to clear the ball and Payet bundled it in.
Guingamp - which is back in the top flight after a nine-year absence - had the ball in the back of the net shortly before halftime but Langil's header was ruled out for offside.
However, the home side had started to pose more of a threat and it was awarded a penalty in the 53rd minute but Marseille goalkeeper Steve Mandanda dove smartly to his right to keep out Yatabare's spot kick.
Marseille was looking vulnerable at the back and another mistake allowed Guingamp to score. Reynald Lemaitre dispossessed Nicolas N'Koulou on the edge of the area and crossed in for Yatabare - the top scorer in the second division last year - to tap home.
In Corsica, both Saint-Etienne and Ajaccio struggled to carve out opportunities in searing temperatures. The match was halted at the midway point in each half to allow players to rehydrate.
Brandao scored in the 34th minute after Romain Hamouma rolled the ball across the face of goal from the right flank and the Brazilian striker slotted into an empty net.
Ajaccio midfielder Benjamin Andre was sent off in stoppage time for a second booking.
It is only the second time Saint-Etienne has won their opening league match of the season since 1992. It is also the first time it has won at Ajaccio in 33 years.
Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.