#4 Mustafi
Akin to his defensive partner, Rob Holding, Shkodran Mustafi had a stellar game. And he too kept a top-level forward line quiet. However, he is an odd player, and this isn't meant disrespectfully.
He has won the World Cup, and in the same team as club teammate Mesut Ozil (and current Academy head and former teammate Per Mertesacker). But he gave away a penalty towards the end of the first half at Crystal Palace and often has these defensive lapses.
This game though was the exact opposite. With respect to Palace, they don't have the forward line of Liverpool, and it logically should be harder to defend against Salah, Firmino and Mane.
Going forward, Mustafi should be retained by Arsenal, since he has his moments, like in this draw. Though my genuine view is that he is not a title-winning defender, which is part of the club's ultimate goal.
That said, the Mustafi enigma continues, since today he kept quiet a world-class forward line.