The Ricketts Group would consider upgrading Stamford Bridge to host other sports if they gained control of Chelsea - and insist the club wouldn't have to move during redevelopment work.
The wealthy Americans, who own the Chicago Cubs baseball team, are one of four prospective new owners of the Stamford Bridge club after Roman Abramovich was stuck with heavy government sanctions.
All interested parties have until April 11 to submit their final offers to Raine Group, the bank overseeing the sale, and are using the intervening days to take an in-depth look at the club's infrastructure.