Martinelli was reluctant to accept the praise for netting the important strike, as he told Sky Sports: "I am not the man. I think everyone has a part in this victory. I scored the goal but it was the whole team and the staff and everyone. I am happy and the team is too."
He added: "It gives more confidence [to us]. We know our potential and how tough it is to play against them. Today we beat them and it gives us more confidence to kick on."
Manager Mikel Arteta also hailed the winger's willingness to play despite him being injured, saying: "Another player with big ones too. The physios weren't having it and he said 'I am ready to go'. Leo (Leandro Trossard) got injured and I looked to him and he was already ready to go."