Leeds United have made attempts to sign USMNT attacking midfielder Brenden Aaronson this week, with two bids reportedly lodged for the 21-year-old.
Aaronson's club side FC Red Bull Salzburg have are reluctant to allow the young midfielder to depart Austria mid-season due to the club's commitments in the Champions League.
Salzburg have reached the knockout stages for the first time in their history and understandably seek to keep as strong a squad as possible for their tie with Bayern Munich in the Round of 16.