Former Gunners striker says he was surprised by the Mexican, while Sir Alex Ferguson suggests the forward will be given the time to recuperate from his Gold Cup exploits
United will line up against Henry when they face the MLS All-Stars on Wednesday, and the Frenchman has revealed that he is a big fan of the 23-year-old.
"He's a great finisher," said Henry. "Going to Manchester United and doing what he did was just amazing. I don't think anyone was expecting him to do what he did, but he did it."
Hernandez himself stated how happy he is at United following a debut season which saw him become a fan favourite at Old Trafford.
"I'm happy, I'm enjoying it a lot," Chicharito added. "I'm keeping in a dream. It's a dream come true for me.
"My first game with Manchester United was in [last year's] pre-season, also against the MLS All-Stars and I'm very happy to be with my team again."
However, Sir Alex Ferguson stressed that it may be a while until the striker appears for the Premier League champions after his exploits for his country this summer.
"The first and most important thing is to re-energise him, give him the proper training before we even consider him for the first team because the season will not be decided in the first match," he said.
"When we get to understand where he is in terms of the physical side we then can start introducing him to the team again."