Jannik Sinner, the Italian tennis sensation, received an unexpected birthday serenade from fans at the Cincinnati Open. As he prepared for his semifinal clash against Terence Atmane, the crowd broke into a spontaneous rendition of "Happy Birthday" to celebrate his 24th. Sinner, known for his powerful game and unique arm sleeve, acknowledged the gesture with a wave. He then went on to defeat Atmane in straight sets, setting up a thrilling final against Carlos Alcaraz. Sinner's performance continues to impress as he eyes the U.S. Open. #JannikSinner #CincinnatiOpen #Tennis #Sports #Tennis #JannikSinner