Hull have made a bid for Oxford winger Marvin Johnson, according to Sky sources.
The 26-year-old has been linked with a number of clubs this summer including Leicester, along with Birmingham and Aston Villa.
Johnson joined Oxford from Motherwell a year ago for £650,000 and has since made 40 appearances for the club.
He scored Oxford’s opener in Tuesday’s 3-4 defeat to Cheltenham in the EFL Cup but was replaced after 67 minutes.
Johnson began his career at Solihull Moors before moving to Kidderminster Harriers in 2012. He had a short spell at Hednesford before signing for Motherwell.
While the chase is on for Johnson, Hull have turned down a bid from Burnley for midfielder Sam Clucas, according to Sky sources.
The 26-year-old missed just one Premier League game last season and it is understood the club are not keen to sell.
Hull began their Sky Bet Championship campaign with a 1-1 draw at Aston Villa on Saturday.