that's not really confirming it still has no date, no venue, no network. Also team Alvarez has not been contacted yet. to exercise a rematch clause you don't just say "I'll do it" you actually have to have someone go over the contract. this isn't just going to be they tell alvarez a day in advanced he has a fight. maybe it's just a formality and they know they have 4 weeks, or maybe the contract has to have a tv deal and purse amount before it can be officially submitted.