In 2016, a 19-year-old Alexander Zverev stunned the tennis world by defeating Swiss maestro Roger Federer in Halle, Germany. The breakthrough victory marked him out as one of the sport’s brightest young prospects, with many tipping him to become a future star.
Federer, who was bidding for a ninth Halle singles title and his fourth consecutive crown, lost 7-6, 5-7, 6-3 to Zverev in the semifinals. It was the biggest win of the German's career at the time, and he became the first teenager to defeat Federer since Andy Murray in 2006. Zverev continued his steady rise, breaking into the top 30 and then the top 20 before entering the ATP top 10 on May 22, 2017, at the age of 20.
Rafael Nadal recognised his potential early. After facing Zverev at the Indian Wells Masters in 2016, the Spaniard predicted that the German could become world No. 1, saying, “he is an amazing player. He has all the shots [and] very good physical performance.” Zverev was soon regarded as one of the sport's brightest young prospects. He won ATP titles, lifted the ATP Finals trophy and established himself among the world's elite. Yet, while his rise through the rankings was swift, his progress at Grand Slams proved far more difficult.
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The weight of Grand Slams
Despite his success on the ATP Tour, Zverev repeatedly fell short at Grand Slams. His defeats in crucial matches, including from winning positions, earned him the tag of a ‘nearly-man'. For years, the German's powerful serve, athleticism and consistency made him a regular contender, but he struggled to translate those strengths into a major title. The gap between his achievements on the tour and his performances at the sport's biggest tournaments became a defining feature of his career.
His first Grand Slam final came at the 2020 US Open, where he squandered a two-set lead against Dominic Thiem and lost in five sets. Before the 2026 season, Zverev had reached three Grand Slam finals: the 2020 US Open, the 2024 French Open, where Carlos Alcaraz defeated him; and the 2025 Australian Open, where he lost to Jannik Sinner.
Zverev was devastated by the defeat in Melbourne. After the final, Zverev admitted he began questioning whether he would ever win a Grand Slam title. "I don't know if I'll ever be able to lift the trophy. But I'll keep coming back. I'll keep trying to lift one of those trophies," he said. "I mean, I don't want to end my career as the best player of all time to never win a Grand Slam, that's for sure."
It was a candid admission from a player who had spent years being tipped for greatness but was still searching for a breakthrough at the highest level.
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A season of unexpected opportunities
At the start of 2026, Sinner and Alcaraz appeared to be the clear favourites to dominate men's tennis once again. The pair had shared all four Grand Slam titles in both 2024 and 2025, leaving little room for other players. Alcaraz began the season at the top of the rankings with 12,050 points, followed by Sinner on 11,500. Zverev was a distant third with 5,110 points.
The Australian Open followed a familiar pattern, with Alcaraz defeating 24-time grand slam champion Novak Djokovic in the final to claim the title and complete the career Grand Slam. However, the balance of power began to shift in the months that followed. Alcaraz suffered a right wrist injury at the Barcelona Open in April, forcing him to miss the defence of his French Open title before withdrawing from Wimbledon.
At Roland Garros, Sinner and Zverev were drawn in opposite halves, prompting predictions of a final between the Italian and the German. But Sinner suffered a shock second-round defeat to Juan Manuel Cerundolo. Zverev seized the opportunity. He progressed to the final without facing a top-10 opponent and defeated Flavio Cobolli to win his maiden Grand Slam title. After years of disappointment, the German had finally delivered.
His Wimbledon campaign ended with another defeat to Sinner in the final. Another opportunity emerged ahead of the US Open when Sinner withdrew from the tournament with a knee injury. Alcaraz returned to action in New York but was knocked out by Ben Shelton in the quarterfinals. Zverev advanced to the final, again without facing a top-10 opponent and setting up a meeting with eighth seed Shelton. The German delivered under pressure, winning 6-3, 7-6(2), 5-7, 6-2 to claim his second Grand Slam title of the season.
For a player who had once questioned whether he would ever lift a major trophy, winning two Grand Slams in a single year represented a remarkable turnaround.
From Grand Slam breakthrough to world No. 1
Zverev's two major titles transformed his position in the rankings, bringing the year-end No. 1 spot within reach. Sinner's season-ending absence through injury strengthened his chances, but Alcaraz posed a threat. That contest was settled at the Shanghai Masters, where Alcaraz suffered a shock defeat to Zizou Bergs in the round of 32. The result secured Zverev's position as the ATP year-end world No. 1.
The achievement marked the culmination of a season in which the German had overcome the biggest obstacle of his career and reached the summit of men's tennis.
"It's been a fantastic season for me, winning in Paris and New York, and knowing that I will finish the year on top of the rankings is just a dream come true," Zverev said.
"So much work and effort have been put into achieving this goal, especially after coming back from the ankle injury. I look forward to finishing the season in style."
Zverev, 29, became the first German man to finish a calendar year as ATP world No. 1 and the oldest player to achieve the distinction for the first time.
There is little doubt that injuries to Sinner and Alcaraz created opportunities for Zverev. Their absences disrupted the dominance they had established over the previous two seasons and opened the door for another contender. But opportunities alone do not guarantee success. Zverev still had to navigate the draws, win the matches in front of him and deliver in two Grand Slam finals.
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Controversy beyond the court
However, Zverev’s career has not been without controversy. Two former partners have accused the German of domestic abuse, allegations he has denied.
In 2020, his former girlfriend Olga Sharypova publicly accused him of physical and emotional abuse when they were together. She described alleged incidents at several locations, including cities where ATP tournaments were held. In subsequent media interviews, Sharypova recounted alleged acts of violence, including claims that Zverev punched her in the face and smothered her with a pillow, leaving her struggling to breathe. She said she had feared for her life.
Zverev denied the allegations, describing them as unfounded. Sharypova did not file criminal charges. The ATP commissioned an independent investigation in October 2021, which examined the allegations and concluded in January 2023 that there was insufficient evidence to substantiate them. The governing body consequently took no disciplinary action against the German. The matter was separate from a case involving Brenda Patea, another former partner with whom Zverev has a child.
In 2023, Patea accused Zverev of physically abusing her during an incident in 2020, alleging that he pushed her against a wall and choked her. In November that year, a German court issued a penalty order against him and imposed a fine.
Zverev denied the allegations and contested the order, leading to court proceedings. In June 2024, the case was discontinued after a settlement was reached between the parties. The proceedings ended without a verdict on his guilt or innocence, and the settlement did not constitute an admission of guilt.
The allegations have remained part of the public discussion surrounding Zverev, even as his sporting achievements have continued to grow.
