Pellegrino called for VAR to be introduced due to the "injustice" of being denied all three points in Hertfordshire, and Silva has sympathy for his opposite number having also been on the receiving end of some dodgy decisions this term.
"Everybody has seen the goal, I don't need to talk about the goal," he told reporters. "Something can happen, and this season we've had other moments when the decisions are against us, but that is football.
"I understand Southampton, I understand their manager, they are unhappy like I was more than one time in games when mistakes are against us."
Watford, currently 10th in the Premier League table, have now recovered eight points from losing positions at home this season.