Carlos Alcaraz broke into the ATP top 5 rankings on Monday, at the age of just 19 years, two months and 20 days. Alcaraz is the second-youngest male player to reach that milestone in the 21st century, only behind fellow countryman Rafael Nadal.Nadal entered the top five when he was 18 years, 11 months and six days old. Apart from the two, Novak Djokovic is the only player this century to have cracked the the top five as a teenager.Speaking on the ATP Tour, an ecstatic Alcaraz stated that he would continue to work hard to reach the top spot."It means a lot," he said. "The hard work that I put in every day for reaching my dreams, No. 1, and little by little I’m reaching my dream. Top five for me is pretty amazing, and I will keep going to be No. 1."But some Djokovic fans are not happy with the development, as the Serb is down to seventh in the rankings despite winning the Wimbledon title earlier this month.One fan took a dig at the ranking system while also praising the Spanish youngster."As I mentioned in one of my previous tweets, it is well deserved but the whole ranking lost a bit of sense having the best player out there prevented from defending/earning 10k points this year (AO, USA). It's easier now to be in the top 5 than it should be," a fan wrote.Sp@ceEagle@SpceEagle1@josemorgado As I mentioned in one of my previous tweets, it is WELL DESERVED but the whole ranking lost a bit of sense having the best player out there prevented from defending/earning 10k points this year (AO, USA).It's easier now to be in top 5 than it should be.5@josemorgado As I mentioned in one of my previous tweets, it is WELL DESERVED but the whole ranking lost a bit of sense having the best player out there prevented from defending/earning 10k points this year (AO, USA).It's easier now to be in top 5 than it should be.Another fan alluded to Djokovic being treated unfairly, in contrast to Roger Federer staying in the top 10 without playing a game for two years."How is this rational, logical or even practical without exposing the systems used to hurt Djokovic? And Federer was in the top ten without playing a game for over 2 years," another user posted.Lalitha@MLalitha108How is this rational logical or even practical without exposing the systems used to hurt Djokovic? And Federer was in the top ten without playing a game for over 2 years!Shame #AtpTour twitter.com/Reggie61823972…Reggie🐺🐊@Reggie61823972Alcaraz just broke into the Top 5!!Djokovic who just won Wimbledon for the 7th time & his 21st Grand Slam is ranked 6thShows u what a joke the ranking system in tennis is right now!!18425Alcaraz just broke into the Top 5!!Djokovic who just won Wimbledon for the 7th time & his 21st Grand Slam is ranked 6th😳Shows u what a joke the ranking system in tennis is right now!!How is this rational logical or even practical without exposing the systems used to hurt Djokovic? And Federer was in the top ten without playing a game for over 2 years!Shame #AtpTour twitter.com/Reggie61823972…Another user called the entire ATP ranking system a "joke.""This year's joke of the ATP ranking not awarding points for Wimbledon will put Djokovic below him," the fan posted.RMC2F@skooldaze_La broma del ranking ATP d’aquest any que no otorga punts per Wimbledon farà que Djokovic estigui per sota seu. TTQR twitter.com/josemorgado/st…José Morgado@josemorgado19yo2m18d Carlos Alcaraz will be a top 5 player on Monday, the youngest since Rafael Nadal in 2005.609654419yo2m18d Carlos Alcaraz will be a top 5 player on Monday, the youngest since Rafael Nadal in 2005. https://t.co/AYRj40di8vLa broma del ranking ATP d’aquest any que no otorga punts per Wimbledon farà que Djokovic estigui per sota seu. TTQR twitter.com/josemorgado/st…Here are a few more reactions:Reggie🐺🐊@Reggie61823972Alcaraz just broke into the Top 5!!Djokovic who just won Wimbledon for the 7th time & his 21st Grand Slam is ranked 6thShows u what a joke the ranking system in tennis is right now!!18926Alcaraz just broke into the Top 5!!Djokovic who just won Wimbledon for the 7th time & his 21st Grand Slam is ranked 6th😳Shows u what a joke the ranking system in tennis is right now!!Pablo@rehtafdogeht@josemorgado After Wimbledon, the ATP ranking is no longer a reliable reference.51@josemorgado After Wimbledon, the ATP ranking is no longer a reliable reference.nautilus2009@Rossana46739171@germanionqn @josemorgado @AndreaGaudenzi @Wimbledon I think nole is beyond the ranging now , his récord will be hard to beat he will be only focuse on winning g GS s@germanionqn @josemorgado @AndreaGaudenzi @Wimbledon I think nole is beyond the ranging now , his récord will be hard to beat he will be only focuse on winning g GS sJesus Hernandez 🎾@jesusitohdez@josemorgado Not a real #5 because of Nole … but good for him.6@josemorgado Not a real #5 because of Nole … but good for him.Leigh Hankin@HankinLeigh23@josemorgado Wouldn't even be top 5 if Wimbledon had ranking points for this year.3@josemorgado Wouldn't even be top 5 if Wimbledon had ranking points for this year.Roger Traderer@rounick28@WeAreTennis 2022 rankings are a joke.ATP has f-ed the tour up beyond all repair.9@WeAreTennis 2022 rankings are a joke.ATP has f-ed the tour up beyond all repair.Novakette100@novakette100@josemorgado Meanwhile everyone finds normal that Novak is no 7 after winning Wimbledon!!!@josemorgado Meanwhile everyone finds normal that Novak is no 7 after winning Wimbledon!!!Carlos Alcaraz looking to defend his title in Umag this weekCarlos Alcaraz at the German Open in Hamburg.Carlos Alcaraz's maiden ATP singles title came at the Croatian Open last year. He now returns to Umang to defend his title, with the ATP 250 event set to be held from July 25-31.The Spaniard has a challenge on his hands, with the likes of Jannik Sinner, Holger Rune, Sebastian Baez and Francisco Cerundolo also in contention. Last year, the 19-year-old defeated Lucas Pouille, Andrej Martin, Filip Krajinovic, Albert Ramos-Vinolas and Richard Gasquet to clinch the title.He enters the tournament on the back of a 6-4, 6-7(6), 6-4 defeat to Italy's Lorenzo Musetti in the European Open final in Hamburg.