Im not ready to compete: Jannik Sinner pulls out of Cincinnati Open

World No 1 out of tournament with knee injuryItalian trying to stay fit for US Open which starts 30 AugustWorld No 1 Jannik Sinner has pulled out of the Cincinnati Open due to a right knee injury, the Italian announced on Sunday.After consulting with my doctors and my team, I have to announce that I need to withdraw from the Masters 1000 tournament in Cincinnati, he said in a statement posted on the ATP website. My right knee has been bothering me and even though we have been working hard with m...