For some reason, referee Michael Oliver did not award the Red Devils a penalty but the incident was clearly noted by van Gaal who used to manage Demichelis at Bayern Munich.
"Rashford is very quick and Demichelis looked like the years are catching up with him," he said.
"He was a very good defender, he was my centre-back in Bayern but that is the life of football."
"He was nervous," Pellegrini said. "He was not having a good day."