Top seed Jannik Sinner eased past Daniel Elahi Galan 6-1, 6-1 in under an hour to reach the second round of the Cincinnati Open.
Carlos Alcaraz has predicted that he and Jannik Sinner have "years ahead" in their rivalry, with both poised to dominate men's tennis for the foreseeable future.
Rivals Jannik Sinner and Carlos Alcaraz lead the Cincinnati Masters men's singles draw this week.
Jannik Sinner has reportedly been eager to rehire fitness trainer Umberto Ferrara despite previously firing him, following a doping ban.
Carlos Alcaraz has set his sights on returning to the world number one by dethroning Jannik Sinner at the upcoming US Open.
Novak Djokovic and Jannik Sinner have raised fresh injury concerns after pulling out of the upcoming Canadian Masters tournament, leaving fans and organizers questioning their fitness ahead of the hard-court season.