Arsenal hammered Crystal Palace yesterday as they got back to winning ways in fine fashion at The Emirates. Goals had been a problem for the Gunners in recent weeks but there were no such issues yesterday as Mikel Arteta’s side burst into life again. There were two goals apiece for Brazilian duo Gabriel Magalhaes and Gabriel Martinelli, while Leandro Trossard scored in between to ensure an easy win. Martinelli shines for Arsenal v PalaceOf course, the big plus for Arsenal and Arteta was seeing Martinelli get in among the goals. The strikers have not quite fired this season and seeing the £180k…