Mikel Arteta has admitted that he stunned the first Arsenal players to report back in pre-season training with his opening message at a warm weather camp in Marbella. The bulk of the Gunners’ summer schedule is still a few weeks away owing to any Euro 2024 and Copa America commitments. But Arteta sought to get his Arsenal stars not representing their countries together at the end of June for a two-week programme to enjoy a jump start. Arteta initially travelled with Arsenal’s coaching staff out to Marbella with Ben White, Emile Smith Rowe, Jurrien Timber, Eddie Nketiah, Fabio Vieira and Reiss …