Both players are on-loan at OM this season, with Guendouzi to sign permanently in June.
After victory at St Etienne, Payet said: "When you shine in the national team, generally, you come back full of confidence.
"Mattéo had a great week, we are happy for him. 'Willo' also played, he came back confident.
"It's a good omen for our end of the season."
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