Hadi Sacko at Bordeaux
It is unclear if Leeds are attempting to sign Sacko on a permanent or loan basis, with the 22-year-old currently under contract with Sporting Lisbon until 2020.
Sacko was highly rated when he signed for the Portuguese club in 2014 from Bordeaux, signing a six-year contract.
However his time in Portugal has been particularly disappointing, and earlier this year he explained his frustration, shortly after being sent on loan to French side Sochaux.
He was quoted by Portuguese outlet Mais Futebol: "Things dragged on [with contract talks at Bordeaux], I was disappointed, so I accepted the proposal of Sporting.
"I take responsibility for that choice and do not regret it. Now, I do not hide it, it has not been as expected.
"Still, it has made me grow and I have not lost hope to impose myself there. My progress was delayed, but I'm not dead."
Hadi Sacko of Bordeaux
He added that when he signed with Sporting, he had no inkling he would be sent to play for the B Team, instead of the first team squad.
Sacko added: "If I had known ... No one told me. Perhaps there is someone better than me. At the beginning, I admit I had some difficulties regarding the language, but I adapted."
In total he made only four appearances for Sporting's first team, playing 54 times for their B Team instead, scoring 10 goals.
His spell on loan at Sochaux was more productive, playing 14 times for the first team after signing on loan in January, netting twice, but was at least back to playing more competitive football.
Before signing with Sporting he was a French youth international, representing his country and under-16, under-18, under-19 and under 20 levels, playing in the same team as Aston Villa's Jordan Amavi and PSG's Adrien Rabiot.
Whether a move to Leeds is the answer is anybody's guess, but it is clear Sacko needs to get his career back on track by playing regularly, and the Whites are in pole position to provide him with that opportunity - with a dearth of wingers in their squad at present.
Leeds manager Garry Monk