With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Serena Williams competes alone and on a team.
text_B: Serena Jameka Williams -LRB- born September 26 , 1981 -RRB- is an American professional tennis player .. tennis. tennis. The Women 's Tennis Association -LRB- WTA -RRB- has ranked her world no. 1 in singles on eight occasions , from 2002 to 2017 .. 2017 Australian Open – Women's Singles. 2002 Wimbledon Championships – Women's Doubles. WTA. Women's Tennis Association. She became the world no. 1 for the first time on July 8 , 2002 .. 2002 Wimbledon Championships – Women's Doubles. On the sixth occasion , she held the ranking for 186 consecutive weeks , tying the record set by Steffi Graf for the most consecutive weeks as world no. 1 by a female tennis player .. tennis. tennis. Steffi Graf. Steffi Graf. In total , she has been world no. 1 for 319 weeks , which ranks her third in the Open Era among female tennis players .. tennis. tennis. third in the Open Era. Open Era tennis records – women's singles. Open Era. Open Era. Williams ' accomplishments and success in professional tennis have led some commentators , players , and sports writers to regard her as the greatest female tennis player of all time .. tennis. tennis. Williams holds the most Grand Slam titles in singles , doubles , and mixed doubles combined amongst active players .. Grand Slam. Grand Slam ( tennis ). Her record of 39 Grand Slam titles puts her third on the all-time list and second in the open era  : 23 in singles , 14 in women 's doubles , and 2 in mixed doubles .. Grand Slam. Grand Slam ( tennis ). She is the most recent female player to have held all four Grand Slam singles titles simultaneously -LRB- 2002 -- 03 and 2014 -- 15 -RRB- and the third player to achieve this record twice after Rod Laver and Steffi Graf .. 2002 Wimbledon Championships – Women's Doubles. 2014 WTA Finals – Singles. Steffi Graf. Steffi Graf. Grand Slam. Grand Slam ( tennis ). Rod Laver. Rod Laver. She is also the most recent player , together with her sister Venus Williams , to have held all four Grand Slam women 's doubles titles simultaneously -LRB- 2009 -- 10 -RRB- .. 2009 WTA Tour Championships. Grand Slam. Grand Slam ( tennis ). Venus Williams. Venus Williams. Her total of 23 Grand Slam singles titles marks the record for the most Grand Slam wins by a tennis player in the Open Era , and is second on the all-time list behind Margaret Court -LRB- 24 -RRB- .. tennis. tennis. Grand Slam. Grand Slam ( tennis ). Open Era. Open Era. second on the all-time. List of Grand Slam women's singles champions#Most Grand Slam tournament singles titles. Margaret Court. Margaret Court. She is the only tennis player in history -LRB- man or woman -RRB- to have won singles titles at least six times in three of the four Grand Slam tournaments , and the only player ever to have won two of the four Grand Slams seven times each -LRB- seven Wimbledon titles and seven Australian Open titles -RRB- .. tennis. tennis. Grand Slam. Grand Slam ( tennis ). Australian Open. Australian Open. She is also the only tennis player to have won 10 Grand Slam singles titles in two separate decades .. tennis. tennis. Grand Slam. Grand Slam ( tennis ). She has won an all-time record of 13 Grand Slam singles titles on hardcourt .. Grand Slam. Grand Slam ( tennis ). hardcourt. hardcourt. Williams holds the Open Era record for most titles won at the Australian Open -LRB- 7 -RRB- and shares the Open Era record for most titles won at the US Open with Chris Evert -LRB- 6 -RRB- .. US Open. US Open ( tennis ). Open Era. Open Era. Australian Open. Australian Open. Chris Evert. Chris Evert. She also holds an all-time record for the most singles matches won at the Grand Slams -LRB- man or woman -RRB- with 316 matches -LRB- through the 2017 Australian Open -RRB- .. 2017 Australian Open – Women's Singles. Australian Open. Australian Open. She has won 14 Grand Slam doubles titles with her sister Venus , and the pair are unbeaten in Grand Slam doubles finals .. Grand Slam. Grand Slam ( tennis ). As a team , she and Venus have the third most women 's doubles grand slam titles , behind the 18 titles of Natasha Zvereva -LRB- 14 with Gigi Fernandez -RRB- and the record 20 titles won by Martina Navratilova and Pam Shriver .. Natasha Zvereva. Natasha Zvereva. Williams is also a five-time winner of the WTA Tour Championships in the singles division .. WTA. Women's Tennis Association. WTA Tour Championships. WTA Tour Championships. Serena has also won four Olympic gold medals , one in women 's singles and three in women 's doubles -- an all-time record shared with her sister , Venus .. Olympic gold medals. Olympic medal. The arrival of the Williams sisters has been credited with ushering in a new era of power and athleticism on the women 's professional tennis tour .. tennis. tennis. Williams sisters. Williams sisters. Williams was the highest paid female athlete in 2016 , earning $ 28.9 million in prize money and endorsements .. 2016 Wimbledon Championships – Women's Doubles. She has won the Laureus Sportswoman of the Year award three times -LRB- 2003 , 2010 , 2016 -RRB- , and in December 2015 , she was named Sportsperson of the Year by Sports Illustrated magazine .. 2003 Hopman Cup. 2010 French Open – Women's Doubles. 2015 Wimbledon Championships – Women's Singles. 2016 Wimbledon Championships – Women's Doubles. Sportsperson of the Year. Sports Illustrated Sportsman of the Year. Sports Illustrated. Sports Illustrated
related.