#1 Alex Sandro (Juventus)
The Brazilian has emerged as a great left-back in recent years, one of the best in the world, and his style is key to how Juventus play as a whole. After joining from Porto, Sandro made the position his own, completely dominating his flank with his boundless energy and strong tackling. He started all 6 group stage matches, and led his team in tackles per game (3).
He's a modern-day full-back, equally comfortable in attack and defence. Sandro has provided 4 assists in the league for his teammates, 1 in the Champions League, and Tottenham will have to keep a close eye on his movements.
His opposite full-back Stephen Lichtsteiner has tended to sit back more, allowing Sandro freedom to bomb forward and he will look to do the same tomorrow. Tottenham has rotated their right-backs this season between Serge Aurier and Kieran Trippier with both different challenges for Sandro: the more-attacking minded Aurier will push the left-back deeper, forcing him to concentrate on his defensive positioning, while Trippier will allow Sandro to float further forward and try to block him there.
If Pochettino does go with the more defensively-sound Englishman, then Sandro could play a big part in getting in behind the right-back and getting quality deliveries into the box for Higuain to latch onto.