Providing that a takeover goes through as planned, Chelsea potentially face the task of signing several defenders to replace the likes of Antonio Rudiger, Andreas Christensen, Cesar Azpilicueta and Marcos Alonso.
According to reports in Spain, the Premier League outfit are among the clubs who may put forward a proposal for Romagnoli over the coming weeks.
The 27-year-old, who has been restricted to 25 appearances this season due to injury, is out of contract in six weeks' time and appears unlikely to pen fresh terms at San Siro.
Barcelona, Sevilla, Bayern Munich and Borussia Dortmund are also said to be monitoring the situation, with more clubs likely to become involved if Milan remain at an impasse in negotiations with the Italy international. body check tags ::