Kenny Jackett celebrated his fifth anniversary as Millwall manager by watching his side claim a goalless draw at the club where he made his name as a player to extend their unbeaten run to eight games.
The Lions boss and opposite number Gianfranco Zola agreed that neither side did enough to deserve the win, with Watford coming closest to securing it when Almen Abdi's chip hit the bar in injury time.
Jackett, who described himself as "very proud and very pleased" to reach his fifth anniversary at the helm, said: "We've gone eight games unbeaten which does show something.
"The quality perhaps of our attacking play wasn't quite there tonight, the crispness of our passing. We didn't make the most of situations but on the other hand we ground out a very good draw against a side that give you problems.
"They're very comfortable on the ball, they can move it from one side of the pitch to the other and we also during the course of the second half come through losing two key players who have been very instrumental for us this season in (Darius) Henderson and (James) Henry.
"We wobbled for a few minutes and then came strong again and finished the game well. It was a good effort from the players."
Watford manager Zola said: "I think it wasn't our best game in terms of quality, especially in the first half.
"In the second half we tried a bit to up the tempo but it's fair to say Millwall came over here and they played a good game, they defended very well and made it difficult for us. So sometimes you have to accept that.
"They haven't lost in the last eight games so that tells you a lot about their solidity and a good moment for this team."
Zola believes his new-look team is progressing and added: "I think for us right now the key is to get a bit of consistency. I know we want to win but at least we broke the tendency that we win or lose, so it's good to get some good results in a row."