Montpellier beat Castres 29-10 on Friday to win their maiden French Top 14 title in a re-run of the 2018 final, as English No. 8 Zach Mercer played a leading role.
Castres face Montpellier in Friday's Top 14 final in a repeat of their 2018 meeting with both sides having experienced French domestic rugby's rollercoaster ride since their last visits to the Stade…