Question: When was the Swiss professional tennis player born who won the singles title in The 2002 Toray Pan Pacific Open?

Context paragraphs:
2003 Toray Pan Pacific Open: The 2003 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 20th edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2003 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 25 through February 2, 2003.  Lindsay Davenport won the singles title.

2006 Toray Pan Pacific Open: The 2006 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 23rd edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2006 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 27 through February 5, 2006.  Elena Dementieva won the singles title.

2004 Toray Pan Pacific Open: The 2004 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 21st edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2004 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 30 through February 8, 2004.  Lindsay Davenport won the singles title.

2008 Toray Pan Pacific Open: The 2008 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts.  It was the 25th edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2008 WTA Tour.  It took place at the Ariake Coliseum in Tokyo, Japan, from September 15 through September 21, 2008.  Dinara Safina won the singles title.

Martina Hingis: Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA.  She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles.  In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.

2002 Toray Pan Pacific Open: The 2002 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 19th edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2002 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 26 through February 3, 2002.  Martina Hingis won the singles title.

2000 Toray Pan Pacific Open: The 2000 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 17th edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2000 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 29 through February 6, 2000.  Martina Hingis won the singles title.

2010 Toray Pan Pacific Open: The 2010 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts.  It was the 27th edition of the Toray Pan Pacific Open, and was part of the Premier Series of the 2010 WTA Tour.  It took place at the Ariake Coliseum in Tokyo, Japan, from September 26 through October 2, 2010.  Caroline Wozniacki won the singles title.

2012 Toray Pan Pacific Open: The 2012 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts.  It was the 29th edition of the Toray Pan Pacific Open, and part of the Premier Series of the 2012 WTA Tour.  It took place at the Ariake Coliseum in Tokyo, Japan, from September 23 through 29, 2012.  Nadia Petrova won the singles title.

2005 Toray Pan Pacific Open: The 2005 Toray Pan Pacific Open was a women's tennis tournament played on indoor carpet courts.  It was the 22nd edition of the Toray Pan Pacific Open, and was part of the Tier I Series of the 2005 WTA Tour.  It took place at the Tokyo Metropolitan Gymnasium in Tokyo, Japan, from January 28 through February 6, 2005.  Maria Sharapova won the singles title.

Supporting paragraphs: 2002 Toray Pan Pacific Open Martina Hingis
Answer: 30 September 1980