Iga Swiatek is enjoying a pretty good season on the WTA Tour and added a Wimbledon crown to her haul of majors back in July.

Swiatek has delivered a fitness update as the Asian swing starts to fire up, and she will be vying for more silverware before the year ends.

At the US Open, Swiatek received a message from Billie Jean King after her quarterfinal exit, and the tournament did prove a little underwhelming for the Polish performer.

Swiatek was criticised during her defeat to Amanda Anisimova and now, with the dust settling, it’s come to light what the main issue was during the last eight contest at Flushing Meadows.

Iga Swiatek looks up during her defeat to Amanda Anisimova at the 2025 US OpenPhoto by Ishika Samant/Getty ImagesWim Fissette reveals the main problem Iga Swiatek was having during the US Open this year

The US Open is always a tough Grand Slam, given that it comes at the end of a very busy stretch of tournaments on the professional tour.

Swiatek revealed after losing to Anisimova that she hadn’t been practising properly with a niggling injury hampering her practice time.

Still, after beating Anisimova by a double-bagel in the Wimbledon final, it was perhaps a shock that it was the American who booked a semifinal date with Naomi Osaka.

Fissette has now shared what the issue was with Swiatek and why she found things a struggle in her US Open quarterfinal defeat.

He told Sport.PL: “I agree with these observations (About Iga’s serve).

“I think Wimbledon was very good in this regard. And then the tournament in Cincinnati, when Iga served really well in most matches.

“At the US Open, the main problem was that we couldn’t practice. During matches, when there’s more pressure, we focus on the result, of course. Sometimes it happens that, especially serving technique, deteriorates a bit, and we have to deal with it.

“That’s what the days between matches are for, when you can improve your technique, and we clearly missed out on those training days. I think if we could use those days and practice, Iga would have served better against Amanda.”

Swiatek can make waves at the WTA Finals

The 24-year-old hasn’t been knocked out of a Grand Slam before the quarterfinal stage all year, and that means the season has been successful.

In 2023, Swiatek won the WTA Finals, and now she will be dreaming of winning that crown once again in 2025.

As a six-time Grand Slam winner, it’s hard to imagine Swiatek having off days, but even the best can come unstuck at big events amidst a demanding schedule.

Swiatek’s serve has been in the spotlight before and after these claims from her coach, it feels necessary that together they will have to work on things ahead of future tournaments.

Fissette is one of the best in the business, however, and it would be no surprise to see Swiatek back with a vengeance when it comes to this aspect of her game in the near future.