Teenage Tennis Players with the Best Chance to Become Grand Slam Champions Could American Taylor Fritz be another Juan Martin del Potro? Is Borna Coric the next Novak Djokovic? Will Switzerland's Belinda Bencic one day hoist as many major trophies as her compatriot Martina Hingis? Could Naomi Osaka surpass Kei Nishikori as Japan's best hope of winning a Grand Slam? Simply being one of the highest-ranked teens on the ATP World Tour or WTA Tour doesn't automatically qualify a player as a future Slam winner. American Catherine Bellis is having her best year and is ranked No. 115. However, she doesn't make the list because she lacks the size and serve of what has become the prototypical Slam winner in the women's game. So, who are the quick studies? The following are teenagers with the best chance of becoming Grand Slam champions. Jelena Ostapenko, Francis Tiafoe and Jared Donaldson get honorable mentions. Latvia's Ostapenko, 19, is ranked No. 46. This year she reached the final in Doha, Qatar, and has wins over Caroline Wozniacki, Petra Kvitova and Svetlana Kuznetsova. Nina Pantic of Tennis.com wrote, "The 5'10" Ostapenko has an aggressive baseliner’s style of play, combined with just enough patience to wait for the right opportunity." Tiafoe, 18, is among a handful of players hoping to end the Grand Slam drought for American men. After surviving a five-set match against Tiafoe at the U.S. Open, John Isner told reporters the teen's "backhand is world-class," per ESPN's Greg Garber. "He was handling my serve better than anyone, really, maybe outside of Novak (Djokovic). I mean, he was really on it." Donaldson turns 20 on October 9, so he squeaks in on the honorable mentions list. When he upset David Goffin at the U.S. Open, Donaldson became the youngest American to reach the third round of the U.S. Open since an 18-year-old Donald Young in 2007. Daria Kasatkina, 19, won the French Open juniors title in 2014 and has been on an upward trajectory in the WTA rankings. She reached the third round of the Australian Open, where she lost to Serena Williams, who praised the talented young teen after their post-match handshake. "Yeah, I think she's a good player. I thought she had a really good game," Williams told reporters. This year, Kasatkina reached the Indian Wells quarterfinals and has wins over Venus Williams and Timea Bacsinszky. Last year, Kasatkina reached the third round of the U.S. Open. Canada's Denis Shapovalov won the juniors Wimbledon title this year. Last month, he decided to forgo another year of juniors and play on the ATP and Challenger tours. The 17-year-old made a splash at the Rogers Cup in July when he upset Nick Kyrgios. It was Shapovalov's main-draw debut. The youngest member of Canada's Davis Cup team, Shapovalov is a lefty with a one-handed backhand. That rare combo will frustrate many future opponents. Naomi Osaka suffered a heartbreaking loss to Madison Keys at this year's U.S. Open. The 18- year-old was up 5-1 in the third set before Keys stormed back. Although Osaka left a loser that day, she showcased her big-match potential. She defeated CoCo Vandeweghe in her first-round match at the U.S. Open and is into the Toray Pan Pacific Open final in Tokyo, which shows she's maturing in a hurry. In her quarterfinal match in Tokyo, Osaka was down 0-5 in the second set and came back to defeat Aliaksandra Sasnovich. She trailed Elina Svitolina by a set in the semifinals and came back to win the match 1-6, 6-3, 6-2 to reach her first WTA final, where she'll take on former No. 1 Wozniacki. Taylor Fritz, 18, is the only married teenager on this list of future stars, and on the court, Fritz displays poise beyond his years. His mother, Kathy May, reached the top 10, and his father is a tennis coach. John McEnroe thinks Fritz is a future top-10 player. The Washington Post's Dan Steinberg noted his rapid rise: "Fritz was the world’s 1,148th- ranked player in early 2015. His audacious goal this year was to crack the top 100; he got there by late February. He made his first final that month in Memphis—the youngest American to do so in a quarter-century." Of all the teens on this list, Belinda Bencic has achieved the most. She's already defeated Serena Williams and reached a career-high No. 7. She advanced to the fourth round at the Australian Open, where she lost to Maria Sharapova. Fellow teen Ana Konjuh defeated Bencic in the third round of the U.S. Open. Bencic has struggled with injuries this year. A wrist injury forced her to retire in the second round at Wimbledon, and she skipped the Olympics in Rio de Janeiro. She has a solid all-around game. However, her serve is still a liability. But what she lacks in power, she makes up for in shot selection and court sense. Borna Coric’s win over Jack Sock in the Davis Cup quarterfinal against the United States kept Croatia alive, and the 19-year-old has played an instrumental part in his nation's run to the Davis Cup final in November. However, he's nursing a knee injury that might keep him out of the final. Still, he's the second-highest ranked teenager on the ATP Tour, behind Alexander Zverev. He had back-to-back wins over Rafael Nadal and Nick Kyrgios at the Western & Southern Open in Cincinnati—the win over Nadal ended a 10-match losing streak to top-10 opponents. He also defeated fellow teen Fritz in the opening round at the 2016 French Open. Coric compares himself to Djokovic when it comes to self-discipline. He told Sport 360's Reem Abulleil: "I think you need to have that kind of thing where you just know that you can’t do some things which you want to do. I would like to have tiramisu now, but I know that I just can’t. I would like to go out with my friends tonight, but I can’t because I’m playing on Saturday and I need to recover." Ana Konjuh was the Cinderella story of the 2016 U.S. Open. The 18-year-old reached the quarterfinals after upsetting No. 4 seed Agnieszka Radwanska just three years after winning the U.S. Open juniors title. Although Karolina Pliskova steamrolled the teen en route to the final, Konjuh showcased her big-hitting skills. She's strong, athletic and focused. She's risen to No. 55 and could climb a couple of spots higher after reaching the semifinals at the Guangzhou International Women's Open, where she lost a tight match, 7-5, 7-6 (7), to defending champion and former No. 1 Jelena Jokovic. .