That year he also reached the title match of the season-ending ATP World Tour Finals , losing to compatriot Alex Corretja . Former world No . 1 Carlos Costa calls time on his tennis career due to injury problems . The 34-year - old Spaniard has not played since losing at the Madrid Open in May . He won 20 titles in 15 years on the ATP Tour , including the 1998 French Open . He was the first player from his country to top the ATP 's world rankings .
Former world No . 1 Carlos Costa calls time on his tennis career due to injury problems . The 34-year - old Spaniard has not played since losing at the Madrid Open in May . He won 20 titles in 15 years on the ATP Tour , including the 1998 French Open . He was the first player from his country to top the ATP 's world rankings .