Alexis has struggled since making his January move from Arsenal.
He has scored only one goal in his first 10 appearances, and even that was a follow-up after his own penalty was saved by Huddersfield goalkeeper Jonas Lossl.
He has two assists to his name, both in the FA Cup, setting up goals for Ander Herrera against Yeovil on his debut and Romelu Lukaku in the next round against the Terriers, and has been substituted in half of his games to date.
At Arsenal, Sanchez took five games to score his first goal after moving from Barcelona in 2014, compared to three with United - but once he broke his duck with a Champions League play-off winner against Besiktas, he scored in three straight games and four out of five.
Over his Gunners career as a whole, he actually improved from that record of four goals in 10 games to eventually record 79 in 164 - 0.48 per game - as well as 41 assists, one every four games.