World number one Iga Swiatek will not play the Madrid Open after suffering a shoulder injury.
The Pole is in stunning form, having won four titles in a row after prevailing in the Stuttgart Open last time out.
Before that, the 20-year-old – whose winning streak stands at 23 matches – had lifted the trophy at the Qatar Ladies Open, Indian Wells and Miami Open.
"After intense last weeks and winning four titles in a row, it's time to take care of my arm that has been fatigued since the Miami Open and I haven't had a chance to handle it properly," Swiatek, the 2020 French Open champion, wrote in a statement posted to Twitter.
"I need a break from playing so intensively in order to treat my arm well and that's why, unfortunately, I have to withdraw from the Mutua Madrid Open.
"My body needs rest. I'm going to take some time to prepare for Rome and Paris. See you soon there.
"Hopefully, I will play in Madrid many times in the future – I'm looking forward to it."
Swiatek was due to be top seed in the Spanish capital.