Real Madrid captain Sergio Ramos has asked to leave the Santiago Bernabeu on a free transfer after receiving a ‘very good offer’ from China – a request that has been rejected by club president Florentino Perez. Perez and head coach Zinedine Zidane are expected to oversee a mass-overhaul of the playing squad this summer after Los Blancos finished 19 points behind La Liga champions Barcelona, and eight behind runners-up Atletico Madrid. The club is hoping that Zidane’s return can help lure some of the world’s best players to the Bernabeu, with the club interested in PSG sensation Kylian Mbappe , and Chelsea star Eden Hazard, while the future of Gareth Bale remains uncertain. Zidane was counting on Ramos – who captained Real to the three Champions League titles during the Frenchman’s first stint in charge – would remain the leader of his team, but Perez’s revelation has thrown that into doubt. Speaking on Spanish radio station Onda Cero, he said: “They (Ramos and his agent) came to see me in my office and told me they had a very good offer from China but the league rules over there wouldn’t permit them to pay the transfer fee.” “What was I…