Spanish media sources have revealed that Jose Mourinho has spent more than any other manager on new signings since his move to Chelsea in 2004, after the 'Special One' criticised the transfer policies of Manchester City, Manchester United, Arsenal and Liverpool.

During a window where Chelsea have been unusually quiet – signing just Radamel Falcao on loan, former Stoke City goalie Asmir Begovic and Brazilian youngster Nathan – Mourinho has accused Chelsea's rivals of trying to buy the title.

"In the beginning of [Roman] Abramovich coming to Chelsea, Chelsea was buying the title. Now, they are buying the title. All of them, they are buying the title. It is up to us to be strong and to fight them and, obviously, to try and win it again, even without the big investments," Mourinho said.

The Blues boss continued on the same path ahead of Chelsea's Community Shield clash against Arsenal on 2 August, pointing out how Arsene Wenger has broke the bank in the last two summer windows to buy Mesut Ozil and Alexis Sanchez from Real Madrid and Barcelona.

"Every club is different, we don't need to speak about them but if you add up the amounts clubs have spent in the last three or four years I think maybe you will find a surprise. If you put Ozil, plus Sanchez, plus [Calum] Chambers, plus [Mathieu] Debuchy, you will maybe find a surprise," he said.

Spanish newspaper Marca, a long-standing rival of Mourinho, has seized this opportunity to mock Jose's theory. They showed that he has been the boss who has spent the most in transfers since his debut at Chelsea, continuing into his spells at Inter Milan, Real Madrid and his return to Stamford Bridge.

Marca says that Mourinho has spent around €903m (£639m, $998M) in bolstering his squads over the past decade, putting him well ahead of closest rivals Carlo Ancelotti and Manuel Pellegrini.

Even though Mourinho has opted for a different policy at Chelsea this summer, in his first reign at the club he purchased Shaun Wright-Phillips, Didier Drogba, Arjen Robben and Andriy Shevchenko for big fees.

During his time at the San Siro he was behind cash-heavy moves for Ricardo Quaresma, Wesley Sneijder and Diego Milito, while his Real Madrid spell saw him break the bank for stars like Angel di Maria, the aforementioned Mesut Ozil, Luka Modric and Fabio Coentrao.

Meanwhile, ESPN has revealed that despite Mourinho comment's on Wenger transfer policy, Arsenal have invested £166.1m on new players since the start of the 2012-2013, campaign while Chelsea spent £271.6m.