The midfielder was pleased with his team's performance in Sunday's Clasico, and believes the winners of La Liga this season is far from decided
The two giants of world football played out a 2-2 thriller in front of 95,000 spectators at Camp Nou, with Lionel Messi and Cristiano Ronaldo scoring two goals each.
The result leaves Madrid eight points behind their fierce rivals, however, after Los Blancos had to recover from a poor start to the season.
"The eight point gap is still worrying, but slightly less so after playing at the Camp Nou," Kaka was quoted as saying by Marca.
"It can't be said that the title race is over, of course it can't. There's a lot left to play for and we're going to fight to the end."
Real Madrid went ahead through Ronaldo and the Brazilian admits he rues the fact they did not take advantage of the lead.
He added: "We had a great game, but we didn't kill it off."
Meanwhile, Kaka also spoke about former club Milan, with whom he spent six seasons after leaving boyhood team Sao Paulo in 2003.
The Rosseneri currently lie 12 points from the summit of Serie A, after losing 1-0 to fierce rivals Inter in Sunday's Derby della Madonnina.
But the Brazil international pointed to their 3-2 victory at Zenit Saint Petersburg as evidence that his former side are becoming difficult to predict.
He added: "Milan will be the loose cannon of the Champions League," said the Brazil international.
"The victory against Zenit St. Petersburg is clear with regard to the league, Allegri's team is late but must not give up.
"We [Real Madrid] are also eight points behind Barcelona in the table but we still believe.
"The world must have faith in the Rossoneri and give them time to build a new team."