By Dan Marsh Alan Shearer has torn into Marcus Rashford and accused the Manchester United striker of “wasting his talent”. The England forward, 26, missed the Red Devils FA Cup fourth round victory over Newport County on Sunday after missing training on Friday due to illness. Reports revealed that he had been in Belfast in mid-week to visit a nightclub shortly before the United squad travelled to south Wales. Erik ten Hag did not dwell on Rashford’s absence when he was quizzed about it ahead of the match, telling BBC Sport: “He reported ill. Lets say, it’s an internal matter, I’ll deal with it…