Fulham turned down an offer from Middlesbrough for captain Ross McCormack earlier this week, HITC Sport understands.
The 29-year-old has long been a target for Boro, and he almost joined them in 2013 from Leeds United - as reported by GazetteLive - but the moved failed and he switched to Fulham a year later.
McCormack finished 2015 as one of the top-scorers in Britain, and Boro believe that he could be the final piece in the jigsaw to take them to promotion.
Boro's defence has been rock solid, but boss Aitor Karanka clearly feels that they are missing a cutting edge up-front and McCormack is their number one target - as revealed by HITC Sport.
Now HITC Sport understands that Boro's opening offer was rejected earlier this week, but they are ready to go back with another bid.
Fulham have already told Boro that they don't want to sell and the fact they are under a transfer embargo does not help the situation, but the Championship promotion favourites will test their resolve again.
McCormack himself continued his fine form on Saturday with his 15th goal of the season as he scored the only goal of the game in their 1-1 draw at Huddersfield Town.
Middlesbrough are also understood to be in the market for Jordan Rhodes, and if they fail to get McCormack could very well try and tempt Rovers with a cash plus player bid using their Spanish striker Kike as bait.