@JuveJay Do we have any decent fullbacks in the primavera or in the B team?
I can try to give a semi-decent answer, at left back we have a familiar name - Pietro Beruatto, he`s already been a part of the first team during last 2 Allegri preseasons and played in a few friendlies, probably has been at our bench for a game or two, havent played an official game for the first team though, still 20 y old and one of the best players in our U23 team, starting 11 player.
At right back there`s that one we got from Sporting Lisboa, Rafael Fonseca, he`s 18 y old, from Primavera but plays in the U23 side from the start of the season, has 3 games and 2 assists (one in Serie C and 1 in UEFA Youth CL).
Those two are probably the ones who stood out, though in case of emergency and injury/suspension of AS and/or Cuads I guess Sarri would prefer to just change to a non-fullback formation rather than gambling on a U23 player(s)...