Hull saw their hold on the second automatic promotion spot in the Championship cut to one point as nearest challengers Watford ran out 1-0 winners at the KC Stadium.
Troy Deeney grabbed the only goal of the match with a well-taken effort from the edge of the area after 41 minutes as the Hornets piled the pressure on Steve Bruce's Tigers, who now have the slimmest of leads to defend over the final six games of the season.
Only one other goal was scored across three other Championship encounters tonight, that coming at the Reebok Stadium as Bolton ran out 1-0 winners over Huddersfield, with Chris Eagles the man on target.
The night's other matches ended in goalless draws.
The final whistle goes and the game is over.
The throw in is taken by Robbie Brady and the game continues.
Free kick awarded for an unfair challenge on Robbie Brady by Troy Deeney.
The throw in comes from Ikechi Anya.
Corry Evans produces a cross. Joel Ekstrand makes a clearance.
Throw in by Ahmed Elmohamady.
Joel Ekstrand receives a yellow card.
Jonathan Bond takes the goal kick.
Throw in by Robbie Brady.