​Anthony Martial is set to begin talks with Manchester United manager Jose Mourinho having grown concerned by his role at the club, according to t​he Sun. The arrival of Alexis Sanchez from Arsenal has seen the Frenchman shifted from the left of his side’s attack to the right, a position he struggled to perform in during ​Sunday’s 1-0 defeat against Newcastle. Before the loss at St James’ Park, Martial was dropped from the team that beat Huddersfield, replaced by youngster Scott McTominay….