Roger Federer is a Swiss former professional tennis player. He was born on August 8, 1981, in Basel, Switzerland, to a Swiss-German father, Robert Federer, and an Afrikaner mother, Lynette Federer (née Durand), who is from Kempton Park, Gauteng, in South Africa. Since his mother is South African, Federer holds both Swiss and South African citizenship. Federer started playing tennis at the age of eight and became Switzerlands junior champion when he was 14. He has one sibling, his older sister, Diana, who is the mother of twins. Federer is married to former Womens Tennis Association player Miroslava Federer (née Vavrinec), whom he met while they were both competing for Switzerland at the 2000 Sydney Olympics. They have two sets of twins, two girls and two boys.

In summary, Roger Federer is of Swiss nationality, but he also holds South African citizenship due to his mothers origin.