By Matthew Cooper Rafael Marquez has publicly spoken of his desire to become Barcelona’s next manager after Xavi announced that he would be stepping down at the end of the season. Xavi made the announcement after his side were beaten 5-3 by Villarreal over the weekend, a result which leaves them third in La Liga and ten points behind league leaders Real Madrid. And Marquez, who helped Barcelona win four league titles and two Champions Leagues as a player, wants to replace his former teammate. “It’s part of the process,” Marquez said, as per the Metro. “It will come if it has to happen to me. W…