Jannik Sinner receives private message from Charles Leclerc as F1 star plans challenge

Charles Leclerc has revealed that he sent Jannik Sinner a private message after the Italian became the new world No. 1.

The pair have a good relationship, with Sinner constantly in communication with the Ferrari driver.

And Leclerc has now challenged the Australian Open champion to a showdown in another sport, though he believes Sinner will have the upper hand.