Watford boss Paulo Pezzolano admitted his side's energy levels may have dropped in the closing stages as they had to settle for a point at Swansea.
Nestory Irankunda put The Hornets in front with a brilliant free-kick, but they were pegged back by Swansea's 82nd-minute equaliser.
"First half was really good, tactically and individually the players played really well," Pezzolano told BBC Three Counties Radio.
"We were very good for 65, 70 minutes and they couldn't find a way to harm us. Maybe in the last minutes we might have run out of energy a little bit, but the opponents also played a good game.