Crystal Palace are favourites but Leeds United's price has dropped over past 24 hours.
HITC Sport understands that Boro are close on a double deal, while Crystal Palace are nearing a loan signing and two Championship sides are battling for a Riverside forward.
Aston Villa are said to be interested in singing Middlesbrough winger Stewart Downing.
HITC Sport understands the Middlesbrough midfielder is close to a move, which could see the arrival of a Stoke City star.
Peterborough United's explosive winger is reportedly on Aston Villa's shopping list alongside their former flame.
Downing has reportedly been made available for a loan this month.
Aston Villa are reportedly keen on re-signing Stewart Downing from Middlesbrough.
Crystal Palace and Newcastle have been linked with a move for Middlesbrough's Stewart Downing.
The Middlesbrough winger would be a great short-term addition for Leeds United.
HITC Sport understands that Steve Gibson doesn't want to sell him, with Aston Villa, Derby and Fulham all interested.