Chelsea are one of several clubs 'following' Riyad Mahrez's situation at Manchester City. That's according to French news outlet Footmercato, which says that the Blues, Barcelona, Real Madrid, AC Milan and Paris Saint-Germain all hold an interest in the City attacker.
Mahrez sees his contract at the current Premier League leaders expire at the end of the next season, and that has supposedly alerted plenty of clubs around Europe. It's difficult to refuse when somebody who possesses the 31-year-old's talent becomes available.
During his time at Manchester City, the Algeria international has won two Premier League titles, three League Cups, one FA Cup, and two FA Community Shields. Mahrez has been instrumental in practically all of those successes as well.