Both Juan Martin del Potro (left) and Mardy Fish have withdrawn from their next scheduled events. (AFP, Stephen Dunn/Getty Images)
Mardy Fish has withdrawn from next week's Tallahassee Tennis Challenger, citing "personal reasons."
Fish was awarded a wild card earlier this month to the $50,000 ATP Challenger event as he attempts a return to the tour after taking seven months off to recover from complications surrounding a heart arrhythmia, which was diagnosed last spring. Fish has played just two tournaments since the U.S. Open, including this week's Savannah Challenger, where he lost his opener to to No. 103 Ruben Ramirez Hidalgo 2-6, 6-2, 6-4.
Meanwhile, Juan Martin del Potro withdrew
from the Portugal Open because of a virus. He has been replaced by David Ferrer, who took a late wild card. Ferrer is looking to bounce back from a terrible performance at the Barcelona Open, where he lost his opening match 7-5, 3-6, 6-1 to Russian qualifier Dmitry Tursunov. The fourth-ranked Ferrer is also trying to maintain his points lead over Rafael Nadal to secure a top-four seed at the French Open.