The Nigeria striker scored the Hornets' only goal but it was not enough to grab maximum points at home
Emmanuel Dennis has become the first Watford player to score in three Premier League games in a row since February 2017.
The 24-year-old scored Watford's only goal in their 2-1 defeat against Chelsea on Wednesday.
Dennis overcame an injury scare after he was substituted in the Hornets' 4-2 loss against Leicester City on Sunday. He then featured against Thomas Tuchel's side in midweek.
