Former Newcastle United striker, Alan Shearer, has said Manchester United forward, Marcus Rashford is “wasting his talent” and will have “huge regrets” if he doesn’t sort out his disciplinary issues. Rashford was dropped for the Red Devils’ 4-2 win at Newport County on Sunday, after he was spotted at a nightclub in Belfast on Thursday. The England international then missed training on Friday after calling in sick. Ahead of the game, Red Devils’ boss. Erik ten Hag said: “Let’s say it’s an internal matter, I’ll deal with it. It’s an internal matter.” Last season, Ten Hag disciplined Rashford, by…