Manchester City are expected to take their summer spending to almost £220 million in the next 48 hours as they prepare to wrap up deals for full-backs Danilo and Benjamin Mendy in the latest stage of their drastic defensive overhaul.

And Pep Guardiola – who remains hot on the heels of Arsenal forward Alexis Sanchez – also wants to sign a centre half with Alexandar Kolarov on the verge of a £5.8 million move to Roma after asking to leave City.

Guardiola had planned on Kolarov staying but his impending departure means all four of City’s full-backs last season will have been cleared out in the space of a month in a situation that raises fresh questions about the absence of succession planning by director of football Txiki Begiristain.

Kolarov had been expected to provide cover in central defence as well as left-back but his request to join Roma will force Guardiola back into the market for a centre-back to compete with Vincent Kompany, Nicolas Otamendi and John Stones.

City have already missed out on Italy defender, Leonardo Bonucci, who has left Juventus for AC Milan.