Zinedine Zidane is a idiot , he personally wanted Gareth Bale at Real Madrid,and he decided along with the Real Madrid president , that the price for Gareth Bale was a ridiculous 86 million pounds, or 100 million Euros. After the sale was done Zinedine Zidane says Gareth Bale was not worth 86 million pounds.
This year Real Madrid spent 0ver 180 million pounds on buying players, so players had to be sold to generate funds as well , Gonzalo Higuain and others were there for sale.
To prevent a civil war and a revolt by Real Madrid fans and players and the club board. Zinedine Zidane cheaply says that Mesut Ozil had no stomach to fight for his place, like Angel di Maria did.You can not compare these two players even. Mesut Ozil played as a provider to Ronaldo who scored the goals.
In the three years he played at Real Madrid he made twice the number of passes made by Cesc Fabregas..
Real Madrid wanted money so actually both Mesut Ozil and Sami Khedira were for sale at 42 million and 35 million pounds respectively. While Arsenal had done heir paper work, Manchester United were late in completing their paper work, they were after Cesc Fabregas and Marouane Fellini.
Mesut was not at fault anyway it was Real Madrid , and now Spanish banks do not give loans so they had to sell and make money fast.