Columbus Crew have rejected a $1.25m (£970,000) bid from Blackburn Rovers for midfielder Wil Trapp.
Sky Sports News understands the MLS side value the United States international at $3m (£2.32m) but are willing to consider offers of $2.5m (£1.93m).
Trapp has made more than 150 appearances for Columbus Crew since his debut in 2013, and has represented the United States six times.
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It is believed Columbus Crew would prefer to sell Trapp after the MLS season, which ends in November - making a January transfer more likely.
Blackburn Rovers boss Tony Mowbray has already signed four players this summer including Adam Armstrong, who joined the club from Newcastle United earlier this week.