The Red Devils are sitting sixth in the EPL table right now, six points behind form the Liverpool side but the Watford manager thinks that they can still win this year League.
But the Italian manager thinks that the side Manchester United has great player s in their squad and they have the special one as their manager so they can still fight for the crown this year.
They are currently sitting in the sixth spot on the table with 18 points,eight points adrift from the Reds.
The Italian told that last year the Reigning Serie A champions Juventus they are 11 points adrift from the leaders by the end of the October, and they gear themselves up and in there next 25 matches they won their 24 matches and emerged as the winners.
Mazzarri does not have a good relationship with the special one when the special one was the boss of the Inter Milan, after that they have a relationship when the Italian was appointed as an Inter Milan boss back in 2013.
Questioned who can win the premier league crown this season the Italian answered:
“The list of candidates is long.
"Manchester City, Manchester United, Chelsea, Tottenham, Liverpool and Arsenal. Not in all of Europe is there a championship as unpredictable as the English one.
“At United, if a year ago a coach like Van Gaal had problems, it means you need a proper job done and with time, Mourinho will sort everything. City have had some small setbacks but nothing remarkable.
“Mourinho and Guardiola have shown on the pitch during their careers what they are capable of doing. And we have had just 11 maches, it is early to come to conclusions.
"The example of Juventus in Serie A last year maybe enough: there were in mid-table and won the league title.”