Five tennis careers that quietly changed direction in 2026 — and the one question still hanging over each

A ranking is a snapshot, not a story. It tells you where a player sits this week, not whether they spent the spring recovering from surgery, or whether the level behind a current number was built on a single tournament rather than a season. Some of 2026's most interesting plot lines are hiding in exactly that gap — between where a player started the year, where they sit now, and the much messier path that connects the two.

The list was longer before we settled on these five. Leylah Fernandez and Arthur Rinderknech were both considered, but the final selection offered a clearer mix of career turns — from major breakthroughs and coaching changes to injury setbacks, ranking swings and unexpected comebacks.

Auger-Aliassime started 2026 ranked No. 5 and has quietly remained around that area of the rankings for most of the year, reaching a career-high No. 4 in June. Much of the reason for that position, however, can be traced back to the end of 2025, when he won an ATP 250 title, reached a Masters 1000 final and made the semifinals at both the US Open and ATP Finals.

That made the early part of 2026 an opportunity to prove that his top-five ranking was more than a carryover from a brilliant end to the previous season. The quarterfinals at the French Open and Wimbledon were among his best results of the year, although both defeats left bitter aftertastes against Flavio Cobolli and Novak Djokovic. He also won a title and reached a final in February, but since then he has largely disappeared from the biggest headlines in tennis.

His second-round defeat at the US Open was therefore a reality check. Few would have placed Auger-Aliassime among the leading contenders in Flushing Meadows, and the impact on his ranking was immediate. That was compounded by a first-round exit at the China Open. He still has opportunities to finish the season strongly, but he will have to earn his place inside the top 10. He currently sits only No. 15 in the Race to Turin, and could slide several more places in the coming weeks if he cannot reproduce the results that made 2025 such a breakthrough season.

Osaka's 2026 does not contain a collapse the way some of the others on this list do, which is precisely what makes it worth including. She had already made it clear in 2025 that she was back, reaching the Canadian Open final and the US Open semifinals while climbing from outside the top 60 into the top 15. In 2026, the expectation was that she would finally re-establish herself as a Grand Slam title contender and return to the top 10, but the four-time major champion has remained one step short at the biggest stages.

She began the year at No. 17 and is now exactly where she started, although she reached as high as No. 13 only a few weeks ago. The question is whether Osaka has reached her ceiling in terms of ranking or whether another rise is still possible. It will soon be five years since she was last inside the top 10, in October 2021, and while her comeback has been remarkable, the window to add another Grand Slam title is becoming a more pressing question as she approaches her 29th birthday.

Osaka has continued to win matches at Grand Slams and WTA 1000 events with regularity, but she has not gone particularly deep in many of them. Her quarterfinal run at Wimbledon and another quarterfinal at the Canadian Open stand out, while she also reached the final of the Bad Homburg Open during the grass-court swing before retiring during her clash with Karolina Muchova and missing the opportunity to win her first title in more than five years.

A year ago, Medvedev was falling down the rankings and sat around No. 18 in the ATP standings. Twelve months later, he has reinvented himself, returned to the top 10 and climbed all the way to No. 6 — a significant achievement for a player who has remained relevant at the highest level for almost a decade.

Medvedev opened 2026 ranked around No. 13, rebuilding after a 2025 season in which he went roughly 50 matches without winning a title at one point. The year since has been a genuine recovery: he is now world No. 6, has won two titles, including this week's tournament in Hangzhou, and appears on course to return to the ATP Finals after missing the event in 2025 and seeing a six-year streak of consecutive appearances come to an end.

What has made that climb harder to track cleanly is how much change has surrounded it. Medvedev has worked with several different coaching configurations since splitting from his long-time coach in August 2025, with each one lasting only a matter of months before giving way to the next. His current, simplified setup has been in place only since August 2026, and while the results under it have been excellent, it is the shortest-tenured of all his arrangements this year.

The real story, though, is the ranking recovery itself — from a player seemingly stuck in a major slump to a top-six fixture again inside a single season. He has not reached a Grand Slam quarterfinal since 2024, but he has produced several strong results, including the Indian Wells final and a semifinal run at the Rome Open, while maintaining a high level of consistency across ATP 250 and 500 events. He may still be a step behind Sinner, Zverev and Alcaraz, but he has firmly positioned himself among the leading challengers.

Zheng's season began not with a match but with a withdrawal. Still recovering from surgery on her right elbow the previous July, she pulled out of the 2026 Australian Open in January, barely two years removed from reaching the final there. It was a quiet, almost administrative start to a season that would go on to include one of the more dramatic round trips in recent memory.

For months, Zheng appeared on court without the spark that had previously made her such a dangerous player, and she struggled to produce the results expected of her. At first, it looked like a matter of adjustment. Then the concern grew that she might not find her level as the season progressed, surfaces changed and the former version of Zheng — the player who had dazzled on the WTA Tour only a couple of years earlier — remained absent.

By the time the US Open arrived in late summer, her ranking had fallen far enough that she needed to come through qualifying just to reach the main draw. What happened once she got there rewrote the story in real time: Zheng won seven consecutive matches, including victories over Madison Keys and six-time major champion Iga Swiatek, before finally losing to Rybakina, the tournament's eventual champion and new world No. 1, in the quarterfinals.

The run lifted her to her current No. 52 — nowhere near her 2025 peak of No. 4, but a genuine sign of life after a collapse that had looked close to total just weeks earlier. The question Zheng's season leaves behind is simple to state and hard to answer: was the US Open a real turning point for a player whose body is finally catching up to a year-old surgery, or the kind of isolated hot streak that talented players can produce even in the middle of a genuine decline?

Nothing about her 2026 before New York suggested a run like that was coming, which makes it both the best evidence that her old level is still there and a reminder that one tournament, however spectacular, is not yet a trend.

Her mission for the rest of the year is to add points and confidence wherever possible and continue moving back up the rankings. With little to defend over the coming months — and not much to defend at the start of 2027 — Zheng will not need a huge number of results to begin finding her way back towards seeded status at the Grand Slams.

No player on this list hides more hardship behind a strong current ranking than Fils. Back and hip injuries wiped out four consecutive Grand Slams for the Frenchman, from Wimbledon 2025 through Roland Garros 2026, meaning he opened this year not as an active ranked contender but as a sidelined player, watching his points slide while the layoff dragged through the first half of the season.

He returned to build one of the most efficient second halves of anyone in the sport: a title in Barcelona, then, in August, his first career Masters 1000 at the Cincinnati Open, beating three top-20 players and Frances Tiafoe in the final without having played the Australian Open or Roland Garros at all in 2026. The ranking climb since has been remarkable, rising to a career-high No. 9 and making him the first player born in 2004 to crack the top 10.

The most interesting part of Fils' ranking, however, is how little of it has been built on Grand Slam points. He sits inside the top 10 with only one Grand Slam match win this year.

By consistently collecting points at Masters 1000 and ATP 500 events, Fils has been able to build a ranking that could rise significantly higher if he can produce even moderately strong results at the Grand Slams next year.

Everything points towards Fils also qualifying for the ATP Finals, and he has no points to defend during the closing weeks of the season. That leaves him in a strong position to potentially make another significant move in the rankings and emerge as a genuine top-five contender heading into 2027.