Watford boss Tom Cleverley says his side need to improve their game management as they prepare for "nine finals" to reach the Championship play-offs.
The Hornets are four points behind the top six after a 1-0 win over Swansea City at Vicarage Road on Wednesday night.
Moussa Sissoko's emphatic finish after Tom Ince pounced on Goncalo Franco's loose pass gave Watford victory, but Cleverley was critical of a second-half performance in which they almost gave up the lead.
"I don't think it's sustainable to be honest, how we're managing the games," he told BBC Three Counties Radio.