MIAMI (AP) — Inter Miami confirmed Monday that Lionel Messi has a left hamstring issue, one that has popped up about a week before defending World Cup champion Argentina is set to begin its training camp for this summer’s title defense. And the events of Sunday and Monday surely add at least a bit of intrigue to Argentina’s plans. Messi underwent testing on Monday — which almost certainly means an MRI exam, though the team did not divulge what procedures were involved — and was ultimately