As Manchester United prepare for their crunch derby showdown with Manchester City today, Marcus Rashford is a player in the spotlight. The England international is set to lead Erik ten Hag’s attack in the absence of Rasmus Hojlund, who is poised to miss the showdown through injury. And while United have other fine talents in their squad, it’s Rashford who fans will be hoping to step up and make himself counted. It has been a difficult season for the 26-year-old, who has looked a shadow of the player that netted 30 goals across all competitions last season. Rashford has often cut a frustrated f…