If Pogba actually available in January, our starting XI considerably more fit than other big teams in europe after the break. Maybe Danilo have played much in WC (5 games) but he is an RCB now so not really a big problem. Central defender don't need much rotation. Same with Tek (4 games). Kostic have only played 3 games. Bremer and Vlahovic get less minutes play. For Rabiot, even if he plays in the final, doesn't really matter as long as Pogba is available in Januari.