Surprised at home by the Nice newcomer, Montpellier bounced back by claiming a 3-0 victory (25-17, 25-23, 25-21) at Palmeira.
Mavuc could count on the Ukrainian Andrii Diachkov, who scored 23 points.
The team from Hérault will have the advantage of playing the deciding match at home, which will determine which of the two teams will face Toulouse in the semi-final.
