So, how can Walter afford all of this? Guggenheim Partners, the financial services firm that is now part of the TWG Global holding company, manages over $320 billion in assets. His personal net worth is listed as $6.1 billion by Forbes, and as much as $12.5 billion, according to the Bloomberg Billionaires’ Index.

BBC Sport finds out more about the American businessman who is already involved with baseball, basketball, Formula 1, football, tennis and hockey.