The ex-Blues midfielder thinks that his former club's owner must dig deep in his pockets to appease the manager ahead of the new season
EXCLUSIVE
Samuele Dalla Bona has warned Chelsea owner Roman Abramovich that manager Antonio Conte will want more investment in the transfer market as the club's rivals strengthen ahead of the new season.
The Premier League champions have already failed in attempts to secure Romelu Lukaku from Everton after the striker chose Manchester United in a £75 million move.
Strootman wants no more Roma sales after Rudiger
The Blues have managed to snap up defender Antonio Rudiger from Roma, who joined from Roma in a £34m deal on Sunday.