Nope, not weird and not a real pattern. I looked at it further. She's not a quitter. It makes no sense for her to quit after losing a set (esp with only a 1-break differential) in a QF match w/o good reason. Why would she? She had called out the trainer (twice
?) in her previous match. The TC match commentator mentioned her Achilles tendon issue several times during the QF match with Marie.
And heat stroke/exhaustion (DC) is not to be taken lightly. She been hospitalized because of it.
She's played injured quite a few times. And she's lost 1st sets numerous times w/o quitting. Recall she lost the first set to Lauren Davis last year in that marathon AO match. She lost a 1st set last year to Dominika Cibulkova, 0-6, and keep playing (even tho she had been plagued by Achilles and back injuries since Cincy last year).
Last year she won Montreal and then followed it up by reaching the Cincy final. I recall that she was already dealing with Achilles (and back) issues at that point. She headed over to play at the Connecticut Open right after the Cincy final. But the day before her match there, she decided that her body couldn't take it and pulled out even though she was already there at the tournament site.
I'm sure that she hoped that the week off would leave her in good enough condition to play the US Open the following Monday . It didn't. She lost 1st set, 2-6 but kept playing only to lose in 1R. She backed off tennis to recover from injuries and did not play a tournament again until four weeks later at Wuhan (9/25). Lost to Cibulkova in 1R there. She tried to play at China Open the following week but discovered that it was a mistake after the 1st set. An
MRI 3 days revealed a
herniated disk in her back. That China Open match was her last tournament until the following January.
baseline.tennis.com
Rafa (and Novak in the past) have a rep for retiring. Not Simona. And don't get me started on Nick K. Simona's tenacious, aggressive counterpuncher style of play puts a bit more wear and tear on her body than that of Karolina or Elina...