Canelo Alvarez is planning to follow his May 4 three-belt middleweight unification bout against Daniel Jacobs in Las Vegas with a trilogy fight against Gennady Golovkin in September, Alvarez’s trainer, Eddy Reynoso, told The Times. Relaxing after the Valdez workout, Reynoso repeated, “After this fight, very interested in having that fight with Golovkin.” Mexico’s Alvarez fought long-reigning middleweight champion Golovkin …