Chelsea and Manchester City must navigate a tricky ownership rights deal if they're to sign Atletico Madrid star Radamel Falcao.The Sun says Atletico are said to be entitled to just 67 per cent of the fee.

Reports in Latin America suggest it could be as little as 50 per cent.

The rest will go to an investment fund called Doyen Sports Investments who helped Atletico when they got Falcao from Porto.

Malta-based DSI is a subsidiary of the London-based Doyen Group are said to have fronted around £11.5m of the £32m paid.