The Red Devils and the Blues are currently preparing to go head to head at Wembley on Saturday evening as they battle it out for the last remaining piece of domestic silverware on offer this season.
Manchester United head into the game after having sealed a second-placed finish in the Premier League this term, while Chelsea FC ended up in fifth spot and missed out on Champions League qualification.
Hazard is widely regarded as one of European football’s top players and he has earned huge amounts of praise for his strong performances for Chelsea FC in the last few years.
The Belgian will be hoping to help inspire Chelsea FC to FA Cup glory this time around after the Blues were beaten by Arsenal in the final at Wembley last year.
And Herrera believes that Hazard is the leading player in the Premier League, despite Mohamed Salah and Kevin De Bruyne’s fine campaigns this term.
Speaking in an interview with Graham Hunter, Herrera said: “For me, Hazard is the best player in the league.
“In my opinion he’s the best player in the league, I’ve said that since my first day here.”
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news