Manchester United will be chasing a striker signing this summer and the focus may be switching after suffering a transfer blow. Short-term striker signings have been the norm for Manchester United in recent years. Odion Ighalo, Edinson Cavani and Wout Weghorst all came in to give United some brief help before the club finally invested in a signing for the future last summer. Rasmus Hojlund came in from Atalanta, completing a big-money move to Old Trafford after less than a year in Serie A. The Dane had his ups and downs in his first season at Old Trafford, which was to be expected. 16 goals in…