Kadioglu impressed for Turkey at Euro 2024, with his country reaching the quarter-finals, and there is currently a host of speculation surrounding the defender's future.
Arsenal have been heavily linked with the full-back, while it is understood that Brighton & Hove Albion have been in discussions over a potential deal for the Turkey international.
However, according to Turkish journalist Yagiz Sabuncuoglu, there is also interest from Man United, and the Red Devils have allegedly been in touch with Kadioglu's agents.
The report claims that the 20-time English champions have asked 'about the contract terms', with the club wanting to learn his wage demands.
Man United 'emerge' as contenders for Kadioglu
Kadioglu has already played three times for Fenerbahce this season, scoring once in three appearances in the qualification rounds for the Champions League.
The Turkish giants have the left-back on a contract until June 2026 and are therefore in a position to demand a healthy transfer fee, particularly with a number of clubs interested in his services.
The defender made the move to Fenerbahce from NEC in July 2018, and he has represented his current side on 202 occasions, scoring 18 goals and registering 22 assists in the process.
Man United have concerns over their left-back spot for the new season, with Tyrell Malacia still not available due to a serious knee injury, while Luke Shaw struggled with muscular problems last term.
Man United could sign a new left-back this summer
If fit, Shaw will be the first-choice left-back in the coming season, but his ongoing injury issues are concerning for Man United, while Malacia missed the whole of the 2023-24 campaign.
The Red Devils are working to complete a deal for Bayern Munich's Noussair Mazraoui, with the Morocco international set to arrive as a replacement for Aaron Wan-Bissaka, who is joining West Ham United.
Mazraoui and Diogo Dalot will battle for the right-back spot, while Matthijs de Ligt is also expected to arrive from Bayern to boost the team's options in the middle of their defence.
Harry Amass, 17, has emerged as a serious option for the left-back position next term, but he is yet to make a senior competitive appearance for the Red Devils.
Man United are expected to be busy in the closing stages of the transfer window, with the club also believed to be open to signing another attacker if Jadon Sancho departs.