Refers to association football (soccer). In Japanese, サッカー is the standard term, while フットボール may refer to American football or other codes.
I played soccer with my friends on the weekend.
彼はサッカー部に入っている。
He is in the soccer club.
My younger brother plays soccer every Saturday.
I watched a soccer match on TV yesterday.
When I became a junior high student, I joined the soccer club.
He's good at soccer and always scores goals.
professional soccer
soccer ball; football (soccer)