To be honest i don't know. All in all best to win the Tour first and to decide the rest after. Based on the form and momentum.It's a dream scenario though, right? i.e. winning the Tour would be the pinnacle of his career & he'd be able to take a step back & ask himself what he wants next. But IMO only doing one grand tour would be a waste of his peak years, so win or lose the Tour, I'd expect a Vuelta challenge for number 4.