Vingegaard had same injury two or three years ago (Achilles tendon tendinitis), but recovered very well… Hope Ayuso recovers well, too…
Probably just bad luck… I once had the same at the front side of the ankle, trained too much too early after a break… You learn from it…
To get to know limits, you have to get close to these limits. And it can happen you exceed the limits sometimes. You only know afterwards, sadly…
Get well soon, Ayuso… Take your time.
EDIT: Now, Ayuso has the situation Jan Ullrich had most springs: delayed and delayed his season start (in Jan‘s case, normally until Sarthe in April). In Jan‘s case, probably due to a lack of professionalism - in Ayuso‘s case, it might just be exactly the opposite.