straight to your inbox every day for freeOle Gunnar Solskjaer admits Manchester United coaches are working on a specific finish Marcus Rashford is struggling to master in training.Rashford struck his 17th goal of the season in the 4-0 Europa League thrashing of Real Sociedad but his performance was marred by some glaring one-on-one misses in the first-half.The 23-year-old broke into the United side as a centre forward five years ago but Solskjaer has primarily used Rashford on the left flank,