If you're looking for manga similar to Futari Soccer, you might like these titles.
Akaboshi Taka is a 16-year-old boy who loves to play soccer. After being abandoned by his father, he tries to find a job to support himself. His dream is to become a professional soccer player and he goes to every professional club in Japan to try his luck
Entirely unknown nationwide is a high school student named Shino Ryuuji. At a national convention in his last year of junior high, he was allowed to go to a U-16 training camp as a Japanese representative candidate; that was to show a single part. In a friendly match against the U-17 Spain representative, Ryuuji was selected as one of the chosen to bathe in the severe baptism of the world!