It's been a busy few months for the tennis star after her success at Roland Garros in June and then winning the Polish Open on home turf last week, with a 6-0, 6-1 victory over Laura Siegemund.
She's looking to add to the trophy cabinet at the Canadian Open where the 22-year-old world No.1 was spotted training with tape over her mouth while taking swings at the ball.
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Swiatek then took it off at the end of the practice – however the move garnered plenty of reaction online.
Tennis journalist Kamakshi Tandon wrote: "A lot of coaches are going to be very interested in this new training method."
However, one apparent expert on the technique revealed on Twitter that Swiatek was "training for nose-breathing".
They said: "It's a more efficient and effective method of oxygen delivery to the body's muscles, whoever has her training this way is smart tbh (to be honest).
"They're aiming for maximum endurance and knowing Iga, she'll get there."
The star was asked about the practice and she said:
"It's harder to breathe when you are only breathing through your nose and it is easier for my heart rate to go up … but I am not going to be able to explain it properly because I am not an expert," Swiatek confirmed.
The top ranked women's player overcame an early test before running away with a 7-6(6) 6-2 victory over Czech Karolina Pliskova in Montreal to reach the third round of the Canadian Open.