Cesc Fabregas opened the scoring for the hosts from the spot in the 50th minute.
Volland doubled the lead two minutes later and Wissam Ben Yedder scored a brace to seal the deal.
John Boye received a straight red card for a reckless challenge in the 87th minute.
Metz are currently 9th on the league log and Boye is expected to miss some games due to the sending off. Read Full Story