Fulham's Liam Rosenior is expected to move to the Riverside with Franck Queudrue moving in the opposite direction.
Niclas Jensen has been less than convincing lately, so Fulham could do with a left back of Queudrue's quality.
Fulham boss Chris Coleman may want to keep Rosenior, but the need for a left back is so pressing that he may be tempted to do business with Boro.