Tennis fans were left amused by Novak Djokovic's new look as he was seen sporting a beard and mustache ahead of the 2023 US Open.Djokovic has been unable to compete in America since the 2021 US Open. His refusal to comply with the COVID-19 vaccination mandate prevented him from participating in tennis tournaments in the States the last two years.However, a few months ago, US President Joe Biden lifted the COVID-19 restrictions, allowing non-residents and unvaccinated people to enter the country without providing proof of vaccination. Djokovic will, therefore, be able to participate in the 2023 US Open after a two-year absence.The 36-year-old will also be taking part in the 2023 Cincinnati Masters before the US Open. The Cincinnati tournament will serve as his sole preparatory event leading up to the American Grand Slam, as he has made the decision to withdraw from the Canadian Open.Before going to the United States, Novak Djokovic was spotted warming up and sporting a stylish new beard. Tennis fans took to social media to express their reactions upon catching a glimpse of the beard.TRAVEL&Sp🎾rts@travel__SportsKIDS -It's SAFE to try this at home, says @DjokerNole pic.twitter.com/1zPKTlzAIG996KIDS -It's SAFE to try this at home, says @DjokerNole 😜 pic.twitter.com/1zPKTlzAIGOne fan joked that, since Goran Ivanisevic was unsuccessful in helping Novak Djokovic clinch the Wimbledon title, the Serb must have pilfered his coach's beard and taken matters into his own hands."Goran flopped so hard that Novak stole his beard and decided to coach himself," a fan tweeted.Vansh@Vanshagar24Goran flopped so hard that Novak stole his beard and decided to coach himself. twitter.com/travel__sports…20Goran flopped so hard that Novak stole his beard and decided to coach himself. twitter.com/travel__sports…Another fan playfully remarked that considering the beard Novak Djokovic is currently sporting, it appears as though he has given up on his tennis career."Look at that beard he’s given up on tennis.." the fan tweeted.jesse 🌟@ThePrimeJesselook at that beard he’s given up on tennis.. twitter.com/travel__sports…1look at that beard he’s given up on tennis.. twitter.com/travel__sports…Here are a few more reactions:Progress Science 🐊🦋🐐@DtwNovak@DjokovicUk @MicaPasic He is going incognito 🥸2@DjokovicUk @MicaPasic He is going incognito 🥸Rajendra prasad@rajendr83324915@travel__Sports @DjokerNole Why the king is growing a beard …..it’s matured n stoic look though @travel__Sports @DjokerNole Why the king is growing a beard …..it’s matured n stoic look though 🔥Aleksandra #23🏆🎾🇷🇸@Al_x_andraDear Lord it’s all falling apart ‍ twitter.com/djokovicuk/sta…1Dear Lord it’s all falling apart 😵‍💫 twitter.com/djokovicuk/sta…ｎａｊｌａ@NajlaAbuHaider@DjokovicUk @MicaPasic He looks more handsome in a beard, he looks like Messi in a beard, so please keep it always and never shave it off 🤩2@DjokovicUk @MicaPasic He looks more handsome in a beard, he looks like Messi in a beard, so please keep it always and never shave it off 🤩Muriel Rasandiriaka@Maki21020406@DjokovicUk @MicaPasic It's a no for me, but he is on vacation, so shaving is not his priority 2@DjokovicUk @MicaPasic It's a no for me, but he is on vacation, so shaving is not his priority 😂😢😅Jalil H@jay_ih@DjokovicUk @MicaPasic I like to watching him in different looks. It must be nice to shaving 🪒 that often, pretty sure he will shave when he goes to US.4@DjokovicUk @MicaPasic I like to watching him in different looks. It must be nice to shaving 🪒 that often, pretty sure he will shave when he goes to US.Luka 🐺🏆🐯 |#Believe1nAryna| |#Nole24InNewYork |@DjokoLenka@DjokovicUk @MicaPasic Maybe he is letting it unshaved till his next GS title ???Like "This is the bard from my 23rd GS "2@DjokovicUk @MicaPasic Maybe he is letting it unshaved till his next GS title ???Like "This is the bard from my 23rd GS "DjokoleDjoker@Eclaure2@DjokovicUk @MicaPasic He IS so better with beard and "long hair"2@DjokovicUk @MicaPasic He IS so better with beard and "long hair"Ross@rgourley123@Vanshagar24 Needs to shave that monstrosity off right now, he's having a midlife crisis after losing to Alcaraz2@Vanshagar24 Needs to shave that monstrosity off right now, he's having a midlife crisis after losing to AlcarazAnagh Pal@anaghpal@DjokovicUk @MicaPasic Even if he sports a beard or grows his hair he will win anyway :)@DjokovicUk @MicaPasic Even if he sports a beard or grows his hair he will win anyway :)Novak Djokovic wishes to represent his country in the 2023 Davis CupNovak Djokovic at the 2022 Australian OpenNovak Djokovic has expressed his intention to represent his country at the 2023 Davis Cup finals. The Serbian team will play in Group C alongside Spain, the Czech Republic, and South Korea. The event is scheduled to take place in the city of Valencia, Spain from September 12 to 17.Djokovic recently expressed his disappointment at not being able to represent Serbia in the previous season's Davis Cup. Placed in a challenging group last year, Serbia fell short of reaching the finals, where he was expected to join them.“I didn't play last year - I felt guilty because I was hoping that the boys would get through the group in Valencia, so I could join them in Malaga. That format has been established for several years, we had a tough group last year," he said.The Serb also expressed his concern about possibly missing out on this year's Davis Cup final due to a tight schedule. However, he has assured his team's coach that he will be there, representing Serbia in the tournament.“It is true that the schedule is inconvenient, that it is played a week after the final of the US Open,” he admitted. “I hope that I will be healthy and that I will be available.”“But I told the coach Viktor (Troicki) that I am here and - I can't wait,” he added.