VALENCIA, Spain — Former world No. 1 Juan Carlos Ferrero says he'll retire after playing in his hometown Valencia Open next month.The 32-year-old Spaniard moved to the top of the rankings in 2003 after winning the French Open and reaching the U.S. Open final.In 14 years as a professional, he won 15 titles and helped Spain win the first two of its five Davis Cups in 2000 and 2004."It was a complicated decision to leave a world you have lived in intensely . . . but I have had a tough year and you start to notice that you don't have the same ambition and motivation," he said on Wednesday.Ferrero plans to devote time to his tennis academy and hotel.