The Dutchman is said to be eager to recruit the Sunderland midfielder for the second time in just over 12 months.
Sunderland's Jeremain Lens and Rotherham United's Abthony Forde challenge for the ball
Former Sunderland manager Dick Advocaat is interested in raiding his former club before the end of the transfer window, with the Sunderland Echo reporting that the new Fenerbahce boss is keen to sign Jeremain Lens.
The 28-year-old was on the bench in the club's opening day loss to Manchester City, failing to get any minutes in the first game of new manager David Moyes.
But Advocaat, who BBC Sport have said is set to take over at the Turkish runners up, is looking into the possibility of recruiting Lens, possibly on a loan, having pushed for his transfer last summer.
The Dutch international was a big money arrival from Dinamo Kiev in July 2015, but struggled to stay fit and in favour at the Stadium of Light, especially in the second half of the season.
Jeremain Lens scores the second goal for Sunderland
Lens played just three times after January, mainly on account of a groin injury. However, he made a man of the match return in the final match of the season, scoring once and setting up the other goal in a 2-2 draw with Watford.
But with Moyes bringing in Adnan Januzaj from Manchester United this year, it is had to imagine the Scot finding a position for all of the clubs attacking midfielders, and it may be Lens that is deemed the disposable option, though the Black Cats would surely rather recoup the reported £8 million (Echo) that they forked out to bring him to the Stadium of Light.
Jeremain Lens celebrates with Sebastian Larsson (L) and Jack Rodwell (C) after scoring for Sunderland