Jannik Sinner has a dominant lead at the top of the ATP Rankings - but he could still be knocked off the top spot.

The world No. 2 also discusses the recent NBA trade deadline and his upcoming reunion with Jannik Sinner in Las Vegas.

Brazilian 18-year-old Joao Fonseca saved two match points and pushed past Argentina's Mariano Navone 3-6, 6-4, 7-5 in the quarterfinals of the IEB+ Argentina Open on Friday in Buenos Aires.