The North Londoners have long been linked with a move for the Romanian, and Villas-Boas joked that another club could still snatch him from under their noses, as Chelsea have done with Willian.
"Vlad Chiriches, there is an interest in the player," Villas-Boas told reporters. "Maybe somebody steals him as well!
"We have looked to strengthen our backline with the departure of Steven Caulker, last year we had Younes [Kaboul] injured for the season but we had five, so we are looking for the position and we are going to go ahead with our re-strengthening."
The 23-year-old has won 19 caps for his country.