Martina Navratilova Celebrates 70th Birthday with Tennis Achievements Highlighted

• Martina Navratilova turns 70 on October 18.
• Navratilova did not officially retire until after the 2006 US Open, when she was about to turn 50.
• She is considered one of the greatest tennis players of all time.
• Three of her best tennis accomplishments are being highlighted on her birthday.
• It is difficult to pinpoint her three finest achievements due to her illustrious career.