Elena Rybakina, the top seed, was beaten by Katie Boulter on the same day she earlier defeated Tatjana Maria.
What happened?
Elena Rybakina won her first match against Tatjana Maria, with a score of 6-7 7-5 6-0.
But then lost to Katie Boulter, with a score of 7-5 2-6 6-4.
Why it matters for Elena Rybakina
This loss is a significant upset, given Rybakina's world number two ranking.
It will be interesting to see how she responds to this defeat in her next match.
What comes next?
Elena Rybakina will look to bounce back from this loss in her next tournament.
She will need to regain her focus and composure to compete at the highest level.
The WTA Queen's Club Championships continue, with other top players competing for the title.
Donna Vekic beat Marie Bouzkova, and Iva Jovic beat Amanda Anisimova, in other notable matches.
Elena Rybakina's loss to Katie Boulter is a reminder that anything can happen in tennis.
The sport is unpredictable, and upsets can occur at any time.
Katie Boulter's win is a significant achievement, and she will look to build on this momentum.
The WTA Queen's Club Championships will continue, with the semi-finals and final still to come.
Elena Rybakina will look to learn from her loss and come back stronger in her next tournament.