Carlos Sr. made a name for himself in Spain when he was just a teen, thanks to his impressive tennis skills.

He became a nationally ranked player and even worked his way up to reach the ATP rankings in 1990.

Unfortunately, as his career just began to take off, he couldn't continue due to financial limitations. 

Although he didn't make it to the big leagues, he was a huge component to his son's massive success later on. He stayed in the sport by becoming the tennis director at the Real Sociedad Club de Campo de Murcia.

Fun fact: Tennis runs in the family, and Carlos Sr.'s own dad helped build the tennis club years before.

Carlos Sr. became his son's tennis couch and the hard work and long hours together paid off.

The duo are extremely close and Carlos Jr. shared the huge impact that his father has on him.

He revealed to Sports Illustrated: "I loved tennis since the beginning. I mean, my father brought me my first racket, and the first time that I played tennis I fell in love." 

In fact, the rising tennis legend pays homage to his father's help any chance he can get, and his father continues to support him at all his tournaments.

Carlos Jr. gushed about his dad, during his on-court interview at the Australian Open, sharing: "I'm just really proud and happy to see my dad [living] these experiences because it was really his dream when he was playing tennis. I'm just really proud and really happy to see him making this dream with me."