Djokovic suffers surprising defeat in Cincinnati, raising questions about his readiness for US Open.
The intense heat played a significant role in Djokovic's unexpected loss.
Tirante's victory over Djokovic marks a career milestone for the young Argentinian.
As tennis evolves, Djokovic's place among the top players is under scrutiny post-match.
Fans eagerly await Djokovic's response and recovery ahead of the US Open.