Watford manager Walter Mazzarri confirmed to "Sky Sports" that midfielder Roberto Pereyra will miss the club's weekend match, and although he hasn't suffered a serious injury, the midfielder is expected to miss around a month with a knee injury: "For sure it won't be too short. From my experience I have a feeling that it's not a terrible, terrible injury, but at the same time I think it's not very short as an injury."
