Chelsea and Paris Saint-Germain are monitoring Borussia Dortmund winger Karim Adeyemi, according to Jeunes Footeux.
The two giants may decide to move for the Germany international either in January or June.
Chelsea prefer to wait until the summer, but could end up losing the 22-year-old if PSG were to snatch the youngster earlier.
Adeyemi has been one of Dortmund's best players in recent months, he scored five times and provided the same number of assists in eight competitive matches this campaign.
His deal with Dortmund expires in 2027, and has a current market value of €35 million, as per Transfermarkt.