In the ongoing contest between excellence and fortune that defines championship football, Arsenal preserved their perfect Premier League start with a 2-0 victory over Sunderland on Saturday — yet the result carried the weight of what might have been. A disputed penalty call in the 55th minute, saved by goalkeeper David Raya, separated a comfortable win from a potential unraveling, prompting manager Mikel Arteta to question whether the game's officials are equal to the gravity of the moments they govern. Twelve points from twelve, four clean sheets, and a place at the summit — but the fragility