Giggs has moved from respected senior team-mate to interim manager and was paid a marvellous tribute by some of the greatest names in football when collecting his Lifetime Achievement Award at the club's annual ceremony at Old Trafford.
"It's unbelievable," Hernandez told MUTV, referencing praise from the like of Pele, Platini, Cantona, Del Piero and many others. "There are no words to describe him. Like all the personalities in the video said, very important people for the game, they spoke really well about him. What he has done [in the game] is unbelievable.
"To be at a club for 26 years, to be at a very high level for all those years is incredible. He's helped a lot of young people, just as other people helped him. It's been a privilege to be with him.
"I expressed myself when Sir Alex was here - I was a player for Sir Alex Ferguson. I'm going to be one of the players for Giggsy. You never know if he's going to stay next year or if we will bring in another manager but, if Giggsy stays or not, it's been unbelievable to play for him. There are not enough words to describe it."