The 19-year-old forward made four appearances during a loan spell with Wigan Athletic last season and could move from Old Trafford on another temporary deal this summer
The Spanish club finish bottom in La Liga last season, while Henriquez, who was signed from Universidad de Chile in September 2012, was loaned out to Wigan Athletic in January.
"We are very interested in Angelo Henriquez," Herrera told El Mercurio.
"We have been following him and we hope to get a response from their club soon. He is a striker full of technical qualities, and could be a good signing."