The well-known and well-respected Sky Sport journalist has claimed on Gianlucadimarzio.com that West Brom and Udinese are interested in the 23-year-old striker.
The Baggies have had an offer turned down by Mainz, who want €15 million (£13.33 million) for the Frenchman, according to the report.
Le Phoceen has credited Leeds with interest in the former France Under-21 international, with Mainz sporting director Rouven Schroder recently saying that they will consider big bids for him, as quoted on TEAMtalk.
Jean-Philippe Mateta Stats
Mateta has made 12 starts and three substitute appearances in the Bundesliga for Mainz so far this season, scoring seven goals and providing one assist in the process, according to WhoScored.
During the 2019-20 campaign, the 23-year-old striker made 12 starts and six substitute appearances in the league, scoring three goals and providing one assist in the process, according to WhoScored.
West Brom need Mateta more than Leeds
West Brom are in real danger of going down to the Championship at the end of the season and have scored just 11 goals in 17 Premier League games so far this season.
The Baggies need Mateta more than Leeds, who are sitting comfortably in 12th place and for whom Patrick Bamford has scored 10 goals in the league already this season.