Following his runner-up finish at the Madrid Open, Alexander Zverev sparked a lively debate by declaring himself on the same level as Carlos Alcaraz and Novak Djokovic. The German star grouped the tennis elite into three tiers: Jannik Sinner at the top, then himself alongside Alcaraz and Djokovic, followed by everyone else. But not everyone is buying into that ranking—especially former top-10 player CoCo Vandeweghe.

Speaking on The Big T Podcast, Vandeweghe didn't hold back. "Sascha [Zverev] is not in the same conversation as Jannik, Carlos, or Novak, because of the one thing that he's missing: a Grand Slam," she said. While she acknowledged Zverev's talent and consistency—having been ranked world No. 2 and No. 3 for extended periods—she emphasized that without a major title, he simply can't be compared to the sport's elite champions.

"He's not a Grand Slam winner, has been close for sure, but that elusive Grand Slam is what separates Hall of Famers from the rest," Vandeweghe explained. She pointed to Marcelo Rios, a former world No. 1 who never won a major, as an example of how even the highest ranking can't replace a Grand Slam trophy. "It's not fair to the accomplishments of Novak, Carlos, and Jannik for Sascha to even think he's in that same category."

That said, Vandeweghe did recognize Zverev's place among the top contenders. He's consistently been part of the conversation about the best players yet to win a major—and for good reason. He's reached three Grand Slam finals, each time coming agonizingly close. His first was at the 2020 US Open, where he built a two-set lead over Dominic Thiem before losing a dramatic fifth-set tiebreaker. Four years later at Roland Garros, he took the opening set against Alcaraz but ultimately fell in five sets. Most recently, he was outplayed by Sinner in last year's final.

With the French Open just around the corner, Zverev will have another chance to silence his critics and prove he belongs in that top tier. But for now, Vandeweghe's point stands: until he lifts a Grand Slam trophy, the conversation will always include that one missing piece.