Splendid Nikola Bartunkova Sends Sabalenka Sightseeing at the Great Wall in Beijing

Nikola Bartunkova vs. Aryna Sabalenka — China Open 2026 Third-Round Match Report

Nikola Bartunkova had already shown in Berlin that she could trouble Aryna Sabalenka.

This time, she finished the job in very windy conditions.

The 20-year-old Czech defeated the world No. 2 6-4, 6-3 in Beijing, producing a performance far more complete than the ranking gap might suggest. Before the Australian Open, Bartunkova stood at No. 126. She arrived here at No. 34, almost 100 places higher.

That makes this upset less seismic than Alina Charaeva’s dispatching of world No. 1 Elena Rybakina one day earlier, but it is still a major result.

Sabalenka had an opportunity to close the rankings gap at the top.

Instead, Bartunkova increased it by 125 points.

Bartunkova Strikes First and Never Lets Sabalenka Settle

The opening set began with a break.

Bartunkova immediately took Sabalenka’s serve for 1-0, then backed it up to lead 2-0.

Sabalenka stayed close and reduced the deficit to 2-1, but she could not find a way back onto level terms.

Bartunkova kept moving in front.

She held for 3-1, then survived an extremely long service game for 4-2, saving multiple break points and refusing to give Sabalenka the opening she was waiting for.

Sabalenka held for 4-3.

Bartunkova answered.

At 5-4, the Czech served for the set and closed it out 6-4.

The key detail was not merely that Bartunkova had broken once.

It was that Sabalenka had created five break-point opportunities and converted none of them.

Set 1 at a Glance

• Bartunkova saved all five break points she faced, while her one break-point chance was enough to take the set from Sabalenka.
• Bartunkova won 85% of points behind her first serve (17/20), against just 53% for Sabalenka. Sabalenka won only 3 of 20 points returning Bartunkova’s first serve.
• Bartunkova also handled the big moments better, winning 10 of the 17 pressure points as she took the 47-minute set.

Full Set 1 Stats

Bartunkova	Statistic	Sabalenka
Set 1 Duration: 0h47m
1.23	Dominance Ratio	0.81
14	Winners	14
8	Unforced Errors	9
293	Serve Rating	260
3	Aces	2
1	Double Faults	1
56% (20/36)	1st Serve %	53% (17/32)
85% (17/20)	1st Serve Points Won	53% (9/17)
50% (8/16)	2nd Serve Points Won	73% (11/15)
100% (5/5)	Break Points Saved	75% (3/4)
119	Return Rating	65
47% (8/17)	1st Return Points Won	15% (3/20)
27% (4/15)	2nd Return Points Won	50% (8/16)
1/4	Break Points Won	0/5
37	Total Points Won	31

Sabalenka Cannot Find an Opening

Sabalenka began the second set with a hold.

Bartunkova leveled and then struck again, breaking for 2-1.

The next game became another major test.

Bartunkova was pushed hard, but she held for 3-1 and once again denied Sabalenka the chance to make the match unstable.

From there, the Czech remained in control.

She held for 4-2.

Sabalenka answered for 4-3.

Bartunkova then moved to 5-3 and forced Sabalenka to serve to stay in the match.

She did not.

Bartunkova broke once more to complete the upset 6-3.

Set 2 at a Glance

• Sabalenka didn’t earn a single break point all set. Bartunkova held all four service games while landing just 36% of her first serves.
• Bartunkova returned superbly, winning 47% of the points on Sabalenka’s first serve and breaking twice from four chances.
• Sabalenka made 16 unforced errors to Bartunkova’s 6, which more than cancelled out her slight lead in winners (14 to 12).

Full Set 2 Stats

Bartunkova	Statistic	Sabalenka
Set 2 Duration: 0h48m
1.49	Dominance Ratio	0.67
12	Winners	14
6	Unforced Errors	16
277	Serve Rating	237
1	Aces	2
1	Double Faults	1
36% (9/25)	1st Serve %	73% (32/44)
78% (7/9)	1st Serve Points Won	53% (17/32)
63% (10/16)	2nd Serve Points Won	50% (6/12)
– (0/0)	Break Points Saved	50% (2/4)
187	Return Rating	60
47% (15/32)	1st Return Points Won	22% (2/9)
50% (6/12)	2nd Return Points Won	38% (6/16)
2/4	Break Points Won	0/0
38	Total Points Won	31

Bartunkova Wins the Match Where Sabalenka Usually Wins It

The statistics explain why the result looked so convincing.

Bartunkova won only 48 percent of her first serves in play, but when that first delivery landed, she won a remarkable 83 percent of those points.

Sabalenka won only 53 percent behind her first serve.

That gap was enormous.

The Czech finished the match having held every single service game.

Sabalenka did not break her once.

Cleaner Tennis Makes the Difference

Sabalenka actually hit slightly more winners, 28 to 26.

But Bartunkova was vastly cleaner.

She committed only 14 unforced errors.

Sabalenka made 25.

That meant Bartunkova did not need to outperform Sabalenka in every attacking category. She simply had to avoid giving away the same volume of free points.

The dominance ratio captured the gap clearly:

Bartunkova 1.39
Sabalenka 0.72

Bartunkova won 75 of the 137 points, compared with 62 for Sabalenka.

That is not a statistical fluke.

It is a decisive win.

Full Match Stats Bartunkova vs Sabalenka

Bartunkova	Statistic	Sabalenka
Full Match Duration: 1h35m
1.39	Dominance Ratio	0.72
26	Winners	28
14	Unforced Errors	25
289	Serve Rating	252
4	Aces	4
2	Double Faults	2
48% (29/61)	1st Serve %	64% (49/76)
83% (24/29)	1st Serve Points Won	53% (26/49)
56% (18/32)	2nd Serve Points Won	63% (17/27)
100% (5/5)	Break Points Saved	63% (5/8)
152	Return Rating	61
47% (23/49)	1st Return Points Won	17% (5/29)
37% (10/27)	2nd Return Points Won	44% (14/32)
3/8	Break Points Won	0/5
75	Total Points Won	62

Sabalenka Misses a Huge Ranking Opportunity

The timing makes the defeat even more significant.

With Jessica Pegula not competing, Sabalenka had an obvious opportunity to make ground on world No. 1 Elena Rybakina after the Kazakh’s early exit.

Instead, the opposite happened.

Bartunkova’s victory increased the gap by 125 points.

That opens the door even wider for the players below.

Coco Gauff, Mirra Andreeva and everyone underneath them now have an unusually good chance to close in considerably if they can put together a deep Beijing run.

Two of the very biggest names in the draw are already gone.

The ranking race suddenly looks much less predictable than it did 48 hours ago.

Berlin Was the Warning

This result did not arrive completely without warning.

Bartunkova had already come close to beating Sabalenka in Berlin, where she pushed the world No. 1 at the time to three sets in the quarterfinals. Beijing showed that she could do more than trouble one of the tour’s most powerful players — she could beat her cleanly.

The broader pattern had already been building across 2026.

Bartunkova has repeatedly tested herself against Top-30 opposition, with wins over Belinda Bencic, Madison Keys, Diana Shnaider, Elise Mertens and Clara Tauson before adding Sabalenka to that list in Beijing.

She has also faced Mirra Andreeva, Amanda Anisimova, Elina Svitolina and Victoria Mboko during a season in which her ranking has climbed from No. 126 before the Australian Open to No. 34 now.

So while beating Sabalenka in straight sets still represents another level, it does not look like an isolated flash.

It looks like the latest step in a very fast rise.

At the end of the day, one old line comes to mind.

Sabalenka was reported to have used the Russian expression that even a stick can shoot once when discussing Rybakina’s US Open win over her.

In Beijing, Bartunkova made sure the stick fired twice.

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