Chile international Sanchez has spent the last eight weeks at Old Trafford, having joined from Arsenal in a high-profile swap deal during the winter window.
Ibrahimovic has yet to feature for United during the 29-year-old's time at the club, but he has still managed to make an impression on Sanchez away from the pitch.
"I trained for a month-and-a-half with Zlatan and his quality is impressive," he told reporters. "We talk and we have a coffee together every day."
Ibrahimovic is expected to leave in the summer after struggling for appearances in his second campaign at United.