World number two Simona Halep said she has been forced to withdraw from the Porsche Tennis Grand Prix in Stuttgart after suffering a hip injury in the Fed Cup over the weekend.
Halep sustained the injury in the Fed Cup semi-finals when she beat France's Caroline Garcia on Sunday. The win was in vain as France won the tie and advanced to the final.
"It was against Garcia in the first set, when I fell down," Halep told reporters on Tuesday. "I felt pain in the hip. If I'm not 100 percent I don't want to step on the court.
"I'm also exhausted mentally because I gave my everything in that tie but unfortunately we couldn't win. That's why I decided to pull out, because I have to think about my health first.
"It feels bad because I gave everything, I really wanted to win the Fed Cup. I've been very sad the last two days, I just need to recover mentally and physically and then just start again."
Halep's withdrawal means she will now rely on next month's clay court tournaments in Madrid and Rome to prepare for her defense of the French Open title.
Meanwhile, Spain's Garbine Muguruza, the 2016 French Open champion, also pulled out through illness. As a result of the withdrawals, Germany's Angelique Kerber moved into the position of the second seed to get a bye to the second round.
Belarusian Victoria Azarenka will now play Russia's Vera Zvonareva while Croatia's Donna Vekic takes on Italy's Giulia Gatto-Monticone.
(For more sports news and updates, follow Ahram Online Sports on Twitter at @AO_Sports and on Facebook at AhramOnlineSports.)