Bafetimbi Gomis converted a second-half penalty as Marseille made it four games unbeaten at home this season with a 2-1 win against Nantes.The 31-year-old striker notched his fifth goal of the season from the spot and set up Clinton N'Jie's first-half equaliser after Emiliano Sala had given Nantes an early lead.Nantes striker Mariusz Stepinski set up the opening goal for Sala, who converted from close range in the second minute, but Gomis teed up a 22nd-minute equaliser for N'Jie, who lashed home a low shot from outside the area.Marseille took the lead in the 53rd minute when Gomis was fouled by Enock Kwateng in the area and picked himself up to slam home his penalty high into the net.Nantes substitute Adrien Thomasson headed straight at home goalkeeper Yohann Pele before the visitors hit the crossbar through midfielder Guillaume Gillet's shot in the 79th minute, but Marseille held on.ends