NAPLES – Napoli's defensive wall held for 75 minutes, then crumbled under Martin Ødegaard's strike. Arsenal won 1-0 at the Diego Armando Maradona Stadium, forcing the Azzurri to begin their Champions League campaign with a defeat. The result was even modest, considering the numerous chances squandered by the English side. After two consecutive defeats in Serie A, Napoli faced another disappointing evening. Adding to the burden were the injuries to Alex Meret and Alisson Santos, both of whom were forced to leave the match. Meret keeps Napoli afloat. In…