Hwang Hee-chan scored on his debut as Wolves got their first Premier League goals of the season in a victory over Watford.
Bruno Lage's side had lost their opening three games 1-0 and after 69 shots without scoring, it took Francisco Sierralta heading into his own net from Marcal's cross to give Wolves the advantage.
Hwang then came off the bench and stabbed home the rebound from close range after Marcal's shot had been blocked on the line.
Watford's club-record 10-game winning home run in the league - which helped them win promotion from the Championship - comes to an end.
Nelson Semedo had Wolves' best chances before the goal but shot straight at keeper Bachmann from Francisco Trincao's through ball - and then slotted wide from Raul Jimenez's backheel.
Jimenez - who has not scored since fracturing his skull in November - headed just wide from Joao Moutinho's free-kick.
Watford - who have not scored since the opening day - had opportunities, with Moussa Sissoko's effort well saved, but they faded after the break.
Afterwards, Watford boss Xisco said: "I think in the first half it was a very good level but after the goal we were a little down. We need to continue working hard. "The difference in the Premier League is in the box. If you create chances and don't score and they have chances and score..."
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