Hingis pulls out of Zurich Open, says she's done for '07

BERNE, Switzerland -- Former world No. 1 Martina Hingis has called an early end to her 2007 season
after failing to recover from a string of injuries and health

Hingis, 27, announced her decision via the organizers of the
WTA tournament in her home city of Zurich, where she was due to
play next week.

"I'm very disappointed that I have to withdraw from the
Zurich Open," Hingis was quoted as saying in Thursday's

"I've done everything I can to be able to compete, but since
Key Biscayne I've had problems with my hip which are stopping me
from playing any more tournaments this year and even from
practicing properly."

Hingis' anticipated withdrawal from the event has led to
Swiss media speculation about a possible retirement.

In Thursday's statement Hingis said she would take "as much
time as it needs to get fully fit again."

Hingis has already announced her retirement from
professional tennis once, hanging up her racket in 2003 after
failing to overcome lingering ankle injuries.

She made a part-time return to the sport in 2005 before
launching a full comeback in 2006 -- winning tournaments in Rome
and Calcutta to finish the year ranked seventh in the world.

She added another title in 2007 with a victory in Tokyo
before the onset of her latest injury troubles.