Watford boss Javi Gracia knows the club's recent form will not last.

The Hornets, along with Liverpool and Chelsea, have won all their four Premier League games this season.

Manchester United travel to Vicarage Road this weekend and Gracia understands it will continue to be difficult to extend their winning streak.

"When you start something you always think you will be good but you do not know if you will be able to achieve four wins in a row," Gracia said.

"But we are in a good moment - we are enjoying it. We know in the future the competition will put us in our place.

"We have had more time because we had two weeks. Some players have been out with their international teams but we have prepared as usual.

"We know it will be a very demanding game. But playing at Vicarage Road we feel strong and think we are able to beat all the other teams, knowing at the same time if we don't give 100% we can lose."