At just 21 years old, Carlos Alcaraz has already won four Grand Slam singles titles with no end in sight. Alcaraz could one day become the GOAT. Until then, the Spanish tennis star is happy paying ...

Stay locked into Sports Illustrated's Serve On SI for all of your tennis news from the court and beyond. Carlos Alcaraz wore a $155 Nike kit at Indian Wells. Carlos Alcaraz debuted a new tattoo at ...