Who can stop Novak Djokovic from winning a record-extending tenth title at the Australian Open in 2023?

Who can stop Novak Djokovic from winning a record-breaking 10th men's singles championship at the Australian Open? At the quarterfinal stage, only two other top-10 seeds are still alive, with 2022 champion Rafael Nadal and Casper Ruud among those who lost early. The only major champion still alive in Melbourne is Djokovic, a 21-time Grand Slam victor. He has only dropped one set in his first four matches despite being limited by a hamstring injury as he attempts to make up for missing the tournament last year. The former world number one, whose visa was cancelled in 2022 and who was deported as a result, hasn't dropped a set at the Australian Open since 2018. This year, can anyone stop him? Andrey Rublev Rublev, the fifth seed, will go up against Djokovic in the quarterfinals on Wednesday at 08:30 GMT. In the fourth round, the Russian defeated Danish 19-year-old Holger Rune after falling behind 5-0 in the final set tie-break. Rublev, 25, has lost two of his three previous matches against Djokovic in straight sets despite his desire to advance to his first Grand Slam semifinal. Stefanos Tsitsipas The highest-ranked player left in the draw is the Greek third seed Stefanos Tsitsipas, who advanced to his fourth semi-final in Melbourne in five years by defeating Jiri Lehecka in straight sets. The 24-year-old semifinalist of the 2021 French Open had won 11 straight sets before fending off Jannik Sinner's comeback in the fourth round. In the final four, he will compete against Karen Khachanov, a competitor he has faced five times before and has never lost to. Karen Khachanov The 26-year-old Russian 18-seed Khachanov, who finished last year's US Open by reaching the final four, is now in his second major semifinal. When Sebastian Korda, Khachanov's quarterfinal opponent, retired due to injury with the score at 7-6 (7-5) 6-3 3-0, Khachanov advanced to the Melbourne semifinals. Khachanov had never advanced past the third round of the Australian Open before this year's competition. Ben Shelton Shelton, an American, is a 20-year-old unknown at this year's Australian Open after making it to the quarterfinals on his first trip abroad. Bryan Shelton's fourth-round Wimbledon performance in 1994 allowed him to surpass his father's Grand Slam record, but the tour rookie has spoken of the freedom he feels after already exceeding expectations in Melbourne. In an all-American quarterfinal, Shelton, who is ranked 89th in the world, will compete against Tommy Paul. Tommy Paul Paul, who has never advanced past the third round of a Grand Slam tournament, is already having a Grand Slam run to remember at the 2023 Australian Open. In the fourth round, the 25-year-old world number 35 defeated veteran of the tour Roberto Bautista Agut in four sets. This was his second victory in Melbourne over a seed after earlier defeating another Spaniard, Alejandro Davidovich Fokina, in five sets.