Hingis retires from Tennis for the third time

Martina Hingis has announced her retirement from tennis for a third time.

The 37-year-old Swiss revealed the news at the WTA Finals in Singapore, where she is playing in the doubles event with partner Chan Yung-jan.

Hingis wrote on Facebook: "Here we are for the third, and final time. Looking back now, it's hard to believe that almost exactly 23 years ago I made my professional debut.

"The years that followed have been some of the most rewarding years of my life, both personally and professionally, but I believe the time has come for me to retire, which I will be doing after my last match here in Singapore.

"I feel very lucky to have been given the opportunity to play this wonderful sport for so many years. Tennis has always been my passion and I am extremely thankful for all the challenges, opportunities, partnerships and friendships it's given me.

"This isn't a goodbye. As history shows, I haven't been able to stay away from tennis for long in the past, and I am looking forward to seeing what new opportunities and challenges lie ahead of me. I believe the best is yet to come."

Hingis returned to the sport for the third time in 2013 and forged a hugely successful career in...