Middlesbrough manager Aitor Karanka expressed his frustration with the way Watford appeared to be time wasting.
Middlesbrough's slump continued with defeat to Watford in a match where Antonio Barragan struggled.
Southampton climbed into the Premier League's top eight with a convincing 3-1 home defeat of Burnley.
Southampton's Charlie Austin scored a brace to lead his side past Burnley 3-1.
English Premier League: Sam Vokes (72') Southampton 3-1 Burnley
English Premier League: Dusan Tadic (72') Southampton 3-0 Burnley