Gary Neville noticed that Gabriel Martinelli was not best pleased with Mikel Arteta at one stage during the second-half as Arsenal beat Liverpool on Sunday. Gabriel Martinelli had a huge say in the 3-1 win which throws the Premier League title race wide open. Martinelli should have set up the opening goal for Bukayo Saka during the first-half, but Saka missed the chance to head home. But the Brazilian did score the crucial second Arsenal goal. He capitalised on a mix-up between Virgil van Dijk and Alisson Becker to tap the ball into an empty net from the edge of the box. Gary Neville says Gabr…