I like Alaba for his versatility, played a lot of CB under Pep and as a CM for Austria. His passing game is also good. In theory, would allow Matuidi (or Pogba, if we get him) more freedom to join attacks from that side as he can stay back with Pjanic. Also, ive got the impression Max likes to have one fullback more defensive than the other, so Alaba fits next to Cancelo. Plus hes good offensively as well, so can be the attacking fullback when MdS plays on the right. If AS leaves, hed be my guy to get, unless Fab has an ace up his sleeve