Cardiff are leading the race to sign South Korea international Kim Bo-Kyung, according to the Cerezo Osaka winger's agent.
The 22-year-old is in demand this summer, with Celtic, Bundesliga champions Borussia Dortmund and French club Monaco all believed to be interested.
Hoops boss Neil Lennon confirmed earlier this week he had his eye on Kim but Lee Yeung Joong, chief executive of the player's agency IvanSports, says the Scottish Premier League winners are yet to table an official bid.
Lee has confirmed Cardiff are in pole position for his signature, claiming negotiations are making "satisfactory progress".
The agent says Kim's transfer fee will be in the region of £3million and wants a deal to be wrapped up before the Olympics get underway later this month.
The sought-after winger will arrive with South Korea's Olympic squad in London this weekend, with their opening match less than a fortnight away.
Lee told Wales Online: "I am currently negotiating with some clubs in the UK, Germany and other countries.
"Those clubs include Cardiff City who have shown assertive attitudes for the transfer of Kim Bo-Kyung. Their manager Malky Mackay really likes Bo-Kyung and negotiations are progressing satisfactorily.
"The transfer fee being discussed is at a level of 3m.
"I also have contacted Celtic through my sub-contracted agent who is working in Scotland. But I have not received any official bid from Celtic.
"I will leave door open for his transfer and consider every possibility with clubs who have interests about Kim Bo-Kyung.
"I aim to complete his transfer matter before the Olympic tournament starts to avoid disruptive influences for Korea Under 23 national team."