Dundee United manager Peter Houston has resigned himself to losing midfielders Craig Conway, Prince Buaben and Morgaro Gomis at the end of the season.
"We know that they're leaving here," said Houston. "They've indicated from early on they want to move on and try something different.
"Craig Conway has been linked with a number of clubs and good luck to them if they all go."
Rangers are one of those linked with Conway, who joined United from Ayr United in 2006 and whose performances won him his first Scotland cap three years later.
Levein also signed Buaben during his spell in charge of United, securing the Ghanaian after he exited Ajax in July 2007, and the 23-year-old has since played more than 100 times for the club.