Negotiations are underway regarding Ousmane Diomande, with Chelsea keen to finalise a deal with Sporting as they look to strengthen their squad for the run-in. The defender has emerged as a top transfer target in recent weeks, and the player's representatives are also believed to be involved in early discussions on personal terms. Whether a deal can be struck remains to be seen, but there is increasing optimism that the transfer could go through in the coming days. Liverpool and Crystal Palace are reportedly waiting in the wings. Finalising a fee and payment terms remains central to closing the transfer. With only 11 goals conceded in 11 (1.0 per game), Chelsea have been one of the stronger defences in the Premier League this season.. Ousmane Diomande would be asked to keep that standard and provide dependable cover when needed. Chelsea have recently been linked with Antoine Semenyo, Endrick Felipe Moreira de Sousa and Daniel Munoz while Sporting have had no rumoured targets. Looking for Chelsea transfer rumours? Follow us on Twitter @PlayerSwitchCom for more rumours just like this.