The two teams meet in the second game of their Champions League group tonight.
Guardiola said, "They have a good coach with Villas-Boas, Payet is an important player, Benedetto has experience.
"They read spaces well, they are very good on set pieces. We will have to find a way to control the game. I hope Bernard Mendy can give us some advice on OM."
The City manager continued: "I remember Boli who scored in 93, Deschamps, Bernard Tapie president. It's the first time I've met OM, it's a shame that the stadium is empty, because we know that the supporters are incredible here."