Watford dealt significant injury blow as star man Ismaila Sarr is ruled out for at least a MONTH with knee ligament injury... sidelining him for busy Christmas period as Hornets battle to avoid relegation in the Premier League Ismaila Sarr picked up a knee ligament injury in Watford's win over Man United The club's star man missed defeat at Leicester and is now out for at least a month Watford confirmed news and said Sarr will be assessed again in a month's time Influential pair Nicolas Nkoulou and Ben Foster are also out into the New Year