Chelsea are the subject of investment interest from billionaire Petr Kellner.

The Sun says Kellner, who founded the PPF investment fund, is a pal of Blues owner Roman Abramovich.

Kellner, 54, has an executive box at Stamford Bridge and is often seen in company with Abramovich - despite Chelsea reiterating the club is NOT for sale.

Respected business magazine Forbes rates the Czech tycoon the world's 88th-richest person, putting his wealth at just over £12billion.

And sources in Prague claim the financial wizard is poised to open talks with the Chelsea hierarchy about a major investment in the next few days.

Chelsea face a costly rebuild of their historic 42,000-seat home ground as they plan to raise its capacity to 60,000.

And Kellner's wealth could yet help elevate the 2017 Premier League winners to a new level.