Football Club Internazionale Milano S.p.A, commonly referred to as Inter Milan or just Inter, is an Italian football club. Inter plays in Serie A, Italy's top division of football and is one of the nation's most successful clubs. In addition to winning this league numerous times, Inter has also won the Champions league three times, the UEFA cup three times, and a FIFA Club World Cup. Inter shares the nation's fiercest and one of the world's most popular rivalries with fellow Milan club - AC Milan.