Socceroos midfielder Jackson Irvine was injured in Hull City's 1-0 loss to English Championship leaders Leeds United while Massimo Luongo's QPR won at Reading.

Leeds returned to the top of the English second tier with the home victory over the Tigers on Tuesday night.

Despite having lost Irvine to an achilles injury after 28 minutes, Hull looked a relative threat on their fleeting advances into their opponents' half.

But it was a Tyler Roberts 51st-minute goal that got Marcelo Bielsa's side back on track, after they had dropped five points in their past two outings.

Hull manager Nigel Adkins said the club were unsure if Irvine would be available to play in Saturday's away game at Sheffield United.

"He got a kick on his Achilles so we'll see," he said.

"It's not like Jacko not to finish a game. He's tried to run it off. We'll just have to wait and see if he's available for the weekend."

Despite a campaign interrupted by illness and injuries, the 25-year-old Australian has become an important player for Hull, scoring three times in eight league games.

"It wasn't ideal because Jacko is one of our energetic players in the middle of the pitch," Adkins said.

"To lose him early doors wasn't ideal."