Mexican international Hernandez joined the La Liga giants officially three days ago on a season-long loan agreement that is also believed to include the option to make things permanent next summer if the player impresses at the Santiago Bernabeu during the coming months.
Speaking about the transfer, Herrera - who has been Hernandez's manager at international level since 2013 - expressed his obvious delight that one of his star turns had arrived at Real, and even appeared to aim a thinly-veiled barb at Manchester United's reputation in the process.
"I'm pleased because Javier has gone to one of the most important clubs in the world. Before he was at United and now his arrival at Real Madrid is phenomenal," he was quoted by The Daily Star.
"I think that he will see a lot more action with his new club. There is no striker like him."
Whether Herrera intended to slight Manchester United or not is unclear, although it seems slightly curious that he is so positive concerning a move that will probably not result in Hernandez finally securing a regular starting berth.
Lack of opportunity?
In truth, the writing was clearly on the wall for Hernandez at Manchester United, with the former Guadalajara star never seen as anything more than a useful impact substitute at Old Trafford.
Monday's surprising arrival of Radamel Falcao from Ligue 1 runners-up Monaco would have pushed Hernandez further down Louis van Gaal's established pecking order, so a swift exit was always likely to be in his best interests.
Despite the obvious allure of Real Madrid, Hernandez's displeasure as being categorised alongside the likes of Ole Gunnar Solskjaer as a 'super sub' makes his decision to join Real slightly puzzling.
While he may make more appearances at the Bernabeu than he would have done under Van Gaal this season, it seems unlikely that the 26-year-old will permanently replace Karim Benzema as Carlo Ancelotti's leading marksman.