Gus Poyet urged his players not to let the FA Cup distract them from winning promotion after his Brighton side advanced to the fifth round.
Ashley Barnes' 11th goal of the season put the League One leaders through to the last 16, but Poyet insisted afterwards that the league remains his top priority.
"Sometimes when you are at the top you need to be careful not to get carried away with the FA Cup and forget about the league," the Uruguayan said.
"At the moment the players are focused, they are convinced we can do anything in both competitions. I saw what happened to Leeds last year, they were beating Premiership teams and during the month they were losing every single game in the league. At the moment we are not doing it so I am pleased, but I hope it doesn't change because the priority is to get up."
Watford manager Malky Mackay was frustrated that his side could not turn possession into chances in front of goal. "It was a below-par performance for us. They're disappointed in there because we didn't click in terms of the chances at goal," he said.
"We probably didn't test Brighton as well as we should. I thought they defended resiliently in the second half and broke on us like they can do, but we gave them a goal. I'm not just talking about the goalkeeper, but we had two to three chances to affect that move before it ended up with a shot at goal, so we're disappointed with that."
Sunday Indo Sport