Paul Ince believes Marcus Rashford needs to leave Manchester United in search of a fresh challenge. It’s fair to say that Marcus Rashford hasn’t been at his best this term in what has been an underwhelming campaign for Manchester United. The 26-year-old has managed seven goals and three assists in the Premier League, which represents a significant drop-off from the last campaign. Indeed, just last season, Rashford managed 17 goals and five assists in the league in Erik ten Hag’s debut campaign. There were also claims earlier this month that Rashford and Ten Hag are not on the best terms, leadi…