Swansea have agreed a fee with Celtic for South Korea midfielder Ki Sung-yueng.
Celtic assistant manager Johan Mjallby revealed earlier on Monday that Ki was poised to leave Celtic after entering talks with a mystery club.
Swansea are understood to be the team in question and they are believed to have settled on a fee in the region of £5million.
Swans boss Michael Laudrup is keen to bring Ki to the Liberty Stadium after seeing Joe Allen leave for Liverpool earlier this summer.
A number of other clubs are thought to be chasing his services, but the Premier League side are in pole position to land the classy playmaker.
Lennon later confirmed that talks over Ki's transfer are at "an advanced stage", although he refused to confirm Swansea were the club involved.
Speaking in Helsingborg ahead of the match with the Swedish champions, the Hoops boss said: "We are in advanced discussions with a club at the minute and we are hoping the deal will go through.
"I am not at liberty to say (if it's Swansea) but there may be interest from other clubs as well.
"He is not here, we have given him a bit of extra time because he has a lot to think about.
"He has only 15 months left on his contract and we feel it is a good offer and good business on our side.
"It is unfortunate to lose a quality player but that has been our strategy at the club for the last two or three years, cultivate these players and eventually move them on if they want to go."