Real Madrid midfielder Mesut Ozil believes they are good enough to challenge for all the major titles this season as he pleads with Kaka to stay at the club.Jose Mourinho's men saw Barcelona win La Liga and the Champions League last term while Ozil and his colleagues settled for the Copa del Rey.However, after playing second fiddle to their Clasico rivals, the Germany international believes it is time for change."Our objective is to win more titles," Ozil was quoted as saying by El Mundo Deportivo."The team is much more mature now and this year we will be fighting for all the titles."Kaka recently claimed he was staying at the Bernabeu despite reports linking him with a move back to AC Milan, and Ozil insists the Brazilian is an integral member of the squad."Kaka is a very important player for us. I have a very good relationship with him."He helps the team and has great potential."Madrid meet Barcelona in the two-legged Spanish Supercopa next month. Source: Goal.com