Watford are rank outsiders against City.
But Capoue argues, "We need the 12th man, that's it.
"It was just instinct, I felt like we needed the 12th man because we've just conceded two goals straight away and it was time to just push everybody.
"I did it for the team and I was thinking 'Come on, we can do it, we're just 2-0 down' and we get it back to 2-2, so it was just instinct and I loved this moment. I loved it.
"I'm going to feel it during the day and it will be the biggest game in my career."