Rubuta ci gaba ga wannan sakin layi - Mascarell ya shafe mafi kyawun lokacin 2017-18 a gefen gefe, saboda raunin Achilles tendon. Ya buga wasan karshe duka
na DFB-Pokal a ranar 19 ga Mayu 2018, yana taimakawa wajen cin nasara 3-1 a kan zakarun gasar FC Bayern Munich.