Stade Rennais conceded a new defeat in Ligue 1, on the lawn of Montpellier (2-1), which showed realism in the first period.
Mavididi (17th and 27th) found the net in the first period.
The Héraultais could have driven home the point when they returned from the locker room but Savanier did not convert his penalty in the 51st.
It was Guirassy who gave hope to the Bretons in the 78th.
An insufficient reduction in score for Rennes, who have taken only two points in the last four matches and now 6th in the championship, just ahead of their opponent of the day, on goal difference.
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League 1 standings