The US Open is coming up at the end of August, with the last Grand Slam of the year taking centre stage at Flushing Meadows.However, there are growing concerns that the world’s best two players, Jannik Sinner and Carlos Alcaraz, could be missing.Sinner and Alcaraz are both struggling with injuries leading up to the Grand SlamGettyAlcaraz beat Sinner in the final of last year’s event, while the latter came out on top against Taylor Fritz in 2024.The pair have dominated the sport in recent years, but there appears to be a chance neither of them play in New York, which could mean it is a very different looking final.For World No.1 Sinner, he has not been seen on the court since winning Wimbledon in July, struggling with a knee injury.He pulled out of the Cincinnati Open on August 9, just six days before the tournament in the United States gets started.And that has led to some worries that the injury he is carrying may end up ruling him out of the US Open too.But Sinner is focusing on making sure that he is fit for the Grand Slam at the end of the month, saying: “After consulting with my doctors and my team, I have to announce that I need to withdraw from the Masters 1000 tournament in Cincinnati.“My right knee has been bothering me and even though we have been working hard with my medical team, I have to accept that I’m not ready to compete yet.“I’m very disappointed not to be able to play in Cincinnati…I can’t wait to be back next year and I’m now focusing on getting ready for the US Open.”Where to watch US OpenThe US Open will get started on Sunday, August 30 and run through until the men’s singles final on Sunday, September 13.The action will be taking place at the USTA Billie Jean King National Tennis Center in Flushing Meadows, New York City.Four-time Grand Slam champion Aryna Sabalenka will be defending her title in the USGettyFans can watch the entire event live on Sky Sports Main Event, Sky Sports Tennis, and Sky Sports+, while you can tune in online via NOW TV or Sky Go too.Coverage begins at times between 3pm and 6pm UK time throughout the two weeks of action.talkSPORT and talkSPORT.com will also keep you up to date with all the latest news and reaction.Listen talkSPORT through the website or find us on DAB digital radio through your smart speaker and on 1089 or 1053 AM.Download and listen to all our live commentaries via the talkSPORT app.For the latest odds and bet boosts for every big event, visit talkSPORT BET.Subscribe to the talkSPORT YouTube channel for news, views and analysis plus our regular goals show and for more, follow us on talkSPORT Facebook and talkSPORT on X.Alcaraz is still World No.2 despite not playing a match since April due to injuryGettyUS Open: Alcaraz’s injury strugglesAlcaraz has been sidelined longer than Sinner, not playing a match since April, missing Wimbledon and the French Open.He entered the Cincinnati Open in July and appeared to be set to make his return to the court this month. However, the Spaniard eventually pulled out as he continues to recover from the wrist injury that has hampered him. Cincinnati Open tournament director Bob Moran said: “We know Carlos is doing everything he can to get back to playing tournaments as soon as possible.”But will he be fit enough to feature in the US Open and defend his title? There are major worries he won’t be.