Jannik Sinner will miss the US Open with a right knee injury.The world No 1 has not played a match since beating Alexander Zverev last month to successfully defend his Wimbledon title, missing the Masters 1000 events in Canada and Cincinnati.The news comes a day after his great rival Carlos Alcaraz, who the Italian lost to in the final in New York 12 months ago, revealed he will make his comeback from four months out with a wrist injury at Flushing Meadows.Sinner said: “Even though I have been working hard with my team and my medical staff, we have now had to make the difficult decision that I will not be able to compete at the US Open this year.“We have been back on court in Monte Carlo over the last couple of days and have realised that I still need more time to recover from my right knee issue.“I’m obviously very sad and disappointed, as New York has a special place in my heart. I was very much looking forward to coming back and playing in the electric atmosphere in front of the great fans there.”