Australian tennis legend Ken Rosewall opened up on the differences between Italian tennis superstar Jannik Sinner and retired compatriot Nicola Pietrangeli, following the latter's claim over Sinner's ability to beat his famous Davis Cup record.

In an appearance on the "La politica nel pallone" podcast, Pietrangeli spoke on Sinner's meteoric rise to the top. The two-time French Open champion is considered by many to be one of Italy's greatest tennis champions, having reached a career-high ranking of World No.3 in 1959. Additionally, Pietrangeli competed in a record 164 Davis Cup matches for Italy.

Although Pietrangeli acknowledged Sinner's ability on the court, the 90-year old stated the current World N0.1 would require "two lifetimes" to break his Davis cu record.

"This success of Jannik Sinner goes beyond sport," admitted Pietrangeli. "Seeing this little boy win such an important tournament like the Australian Open gives you a boost of joy. Sinner has no weak points at the moment, even if he can always improve. ... To beat my record, however, it will take him two lifetimes."

Rosewall was quick to respond when learning of Pietrangeli's words. The retired Aussie star employed a different analogy when comparing the two Italians.

"Comparing him to Sinner is like comparing Rod Laver to Roger Federer, it's impossible to compare, they are different eras," said the eight-time Grand Slam champion in an interview on Punto De Break.

Rosewall stated he believed comparing Sinner to someone from a different era was a difficult task, considering how much the game had evolved over the years. Furthermore, he applauded Sinner's style of play, and admitted he was looking forward to the 22-year old's blossoming rivalry with Spaniard Carlos Alcaraz.