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Stanford - Caster Semenya said on Sunday she will not take part in this year's IAAF World Championships if she loses her legal battle with the IAAF over new rules governing testosterone levels in female athletes.
The two-time Olympic champion extended her four-year unbeaten streak in the 800m on Sunday after cruising to victory at the Prefontaine Classic Diamond League meeting at Stanford University in northern California.
Semenya, who won in 1:55.70, had not raced in the 800m since May 3, shortly after she lost a court challenge against the International Association of Athletics Federations (IAAF) new rules which will force her to regulate her testosterone levels.
That ruling was subsequently put on hold by a Swiss Federal Tribunal pending a full hearing, leaving Semenya free to compete until a final decision in her case.
Semenya had previously indicated that if she loses her legal case, she would continue to compete over longer distances, which are not affected by the IAAF's new testosterone rules.
However speaking to reporters on Sunday, she said there was no chance of her racing at the World Championships in Qatar if she is not allowed to run in the 800m.
"If I'm not running 800m, I'm not running world championships," Semenya told reporters.
"No 1 500m, no nothing. I'm just going to take a vacation and then come back next year.
"My goals are the 800m and to defend my world title. So if I'm not allowed I'm not allowed."
Asked if she expected to compete in next year's Tokyo Olympics, where she will be chasing a hat-trick of 800m gold medals after wins in 2012 and 2016, she replied: "I expect to be in Tokyo. I expect to be in Paris (in 2024), I expect to be in Los Angeles (in 2028)."
Semenya meanwhile insisted she would pursue her case for as long as possible.
"This is like a legal battle, like war," said the South African. "You don't give up. If you beat me today, I beat you tomorrow. At the end of the day it's about me, and doing what makes me happy. I'm a world champion, I'm an Olympic champion, I've achieved everything I've ever wanted.
"I'm doing this for those that cannot fight for themselves."
Semenya has not been beaten over 800m since 2015.
Her winning streak was never in danger on Sunday as she pulled away from the field with 300m to go before crossing the line 15 metres clear of the United States' Ajee Wilson, who took second in 1:58.36. Raevyn Rogers was third in 1:58.65.
In other events on Sunday, US sprinter Christian Coleman blistered to the fastest time over 100m this year, clocking 9.81 to beat out veteran world champion Justin Gatlin in second, who came home in 9.87sec.
Rising American 400m star Michael Norman meanwhile continued his impressive first season as a professional with a comfortable win in the single-lap race, winning in 44.62, ahead of compatriots Kahmari Montgomery and Fred Kerley.
Rai Benjamin of the United States won the 400m hurdles with a world leading time of 47.16, taking the line ahead of Kyron McMaster of the British Virgin Islands (48.94) and Turkey's Yasmani Copello (49.37).
Benjamin's time was the ninth fastest of all-time and followed his victory in the Rome Diamond League meeting on June 6.
There was another world leading time in the women's steeplechase, where Kenya's world record holder Beatrice Chepkoech finished well clear of the chasing pack in 8:55.58.
Chepkoech's time was the fifth fastest in history. The 27-year-old now owns three of the five fastest times ever run over the distance.
In the women's 100m, Ivory Coast's Marie-Josee Ta Lou won a slow race in 11.02, with Americans Aleia Hobbs and Teahna Daniels placing second and third.
Leading results from IAAF Diamond League Prefontaine Classic at Stanford University on Sunday:
Men
100m (wind: -0.1 m/s):
1. Christian Coleman (USA) 9.81sec (WL)
2. Justin Gatlin (USA) 9.87
3. Zharnel Hughes (GBR) 9.97
4. Cravon Gillespie (USA) 10.05
5. Mike Rodgers (USA) 10.08
6. Arthur Cissé (CIV) 10.12
7. Filippo Tortu (ITA) 10.21
8. Cameron Burrell (USA) 10.21
9. Tyquendo Tracey (JAM) 10.42
400m
1. Michael Norman (USA) 44.62
2. Kahmari Montgomery (USA) 45.12
3. Fred Kerley (USA) 45.33
4. Jonathan Jones (BAR) 45.46
5. Wilbert London (USA) 45.57
6. Machel Cedenio (TTO) 45.71
7. Michael Cherry (USA) 45.92
8. Bralon Taplin (GRN) 45.94
9. Baboloki Thebe (BOT) 46.20
110m hurdles (wind: +0,3 m/s):
1. Orlando Ortega (ESP) 13.24
2. Wilhem Belocian (FRA) 13.29
3. Omar McLeod (JAM) 13.29
4. Ronald Levy (JAM) 13.30
5. Devon Allen (USA) 13.33
6. Xie Wenjun (CHN) 13.36
7. Freddie Crittenden (USA) 13.38
8. Aleec Harris (USA) 13.39
9. Greggmar Swift (BAR) 13.56
400m hurdles:
1. Benjamin Rai (USA) 47.16 (WL)
2. Kyron McMaster (ISV) 48.94
3. Yasmani Copello (TUR) 49.37
4. David Kendziera (USA) 49.46
5. Tj Holmes (USA) 49.79
6. Khallifah Rosser (USA) 49.87
7. Amere Lattin (USA) 50.01
8. Ludvy Vaillant (FRA) 50.23
9. Rasmus Mägi (EST) 50.25
Shot put
1. Darlan Romani (BRA) 22.61m
2. Ryan Crouser (USA) 22.17
3. Tomas Walsh (NZL) 21.76
4. Michal Haratyk (POL) 21.61
5. Joe Kovacs (USA) 21.39
6. Darrell Hill (USA) 21.35
7. Tomás Stanek (CZE) 20.77
8. Payton Otterdahl (USA) 20.58
9. Konrad Bukowiecki (POL) 19.28
Pole vault
1. Armand Duplantis (SWE) 5.93 m
2. Sam Kendricks (USA) 5.88
3. Piotr Lisek (POL) 5.71
4. Christopher Nilsen (USA) 5.71
5. Cole Walsh (USA) 5.61
6. Valentin Lavillenie (FRA) 5.61
7. Thiago Braz da Silva (BRA) 5.61
8. Renaud Lavillenie (FRA) 5.46
Women
100m (vent: +0.3 m/s):
1. Marie-Josee Ta Lou (CIV) 11.02
2. Aleia Hobbs (USA) 11.04
3. Teahna Daniels (USA) 11.13
4. Sha'carri Richardson (USA) 11.15
5. Michelle-Lee Ahye (TRI) 11.23
6. English Gardner (USA) 11.24
7. Tori Bowie (USA) 11.30
8. Shelly-Ann Fraser-Pryce (JAM) 11.39
9. Mujinga Kambundji (SUI) 11.42
200m (wind: +1.9 m/s):
1. Blessing Okagbare (NGR) 22.05
2. Elaine Thompson (JAM) 22.21
3. Dina Asher-Smith (GBR) 22.42
4. Salwa Eid Naser (BRN) 22.51
5. Jenna Prandini (USA) 22.53
6. Dafne Schippers (NED) 22.62
7. Brittany Brown (USA) 22.99
8. Kyra Jefferson (USA) 23.07
9. Ivet Lalova (BUL) 23.12
800m:
1. Caster Semenya (RSA) 1:55.70
2. Ajee Wilson (USA) 1:58.36
3. Raevyn Rogers (USA) 1:58.65
4. Hanna Green (USA) 1:58.75
5. Habitam Alemu (ETH) 1:59.25
6. Natoya Goule (JAM) 1:59.82
7. Wang Chunyu (CHN) 2:05.68
8. Nataliia Pryshchepa (UKR) 2:50.33
1 500m:
1. Faith Chepngetich Kipyegon (KEN) 3:59.04
2. Laura Muir (GBR) 3:59.47
3. Shelby Houlihan (USA) 3:59.64
4. Gudaf Tsegay (ETH) 3:59.85
5. Winnie Nanyondo (UGA) 4:00.09
6. Gabriela Stafford (CAN) 4:02.06
7. Jessica Hull (AUS) 4:02.62
8. Kate Grace (USA) 4:02.99
9. Lemlem Hailu (ETH) 4:06.61
10. Alexa Efraimson (USA) 4:06.77
11. Rababe Arafi (MAR) 4:06.78
12. Danielle Jones (USA) 4:07.28
13. Axumawit Embaye (ETH) 4:14.47
14. Winny Chebet (KEN) 4:24.51
15. Linden Hall (AUS) 4:24.78
3 000m:
1. Sifan Hassan (NED) 8:18.49 (WL)
2. Konstanze Klosterhalfen (GER) 8:20.07
3. Letesenbet Gidey (ETH) 8:20.27
4. Genzebe Dibaba (ETH) 8:21.29
5. Laura Weightman (GBR) 8:26.07
6. Hellen Onsando Obiri (KEN) 8:27.26
7. Agnes Jebet Tirop (KEN) 8:27.51
8. Caroline Chepkoech Kipkirui (KEN) 8:31.45
9. Fantu Worku (ETH) 8:32.10
10. Margaret Chelimo Kipkemboi (KEN) 8:32.96
11. Senbere Teferi (ETH) 8:36.26
12. Lilian Kasait Rengruk (KEN) 8:37.31
13. Hawi Feysa (ETH) 8:40.79
14. Karissa Schweizer (USA) 8:42.15
15. Dominique Scott (RSA) 8:43.88
16. Beatrice Chebet (KEN) 8:53.60
17. Weini Frezghi (ERI) 8:53.89
18. Almaz Ayana (ETH) 8:57.16
3 000m steeplechase:
1. Beatrice Chepkoech Sitonik (KEN) 8:55.58 (WL)
2. Emma Coburn (USA) 9:04.90
3. Hyvin Kiyeng Jepkemoi (KEN) 9:05.81
4. Daisy Jepkemei (KEN) 9:08.45
5. Courtney Frerichs (USA) 9:09.75
6. Norah Jeruto Tanui (KEN) 9:10.61
7. Colleen Quigley (USA) 9:11.41
8. Celliphine Chepteek Chespol (KEN) 9:12.37
9. Winfred Mutile Yavi (BRN) 9:12.98
10. Peruth Chemutai (UGA) 9:24.32
11. Mercy Chepkurui (KEN) 9:25.32
12. Rosefline Chepngetich (KEN) 9:27.10
13. Allie Ostrander (USA) 9:31.44
14. Mel Lawrence (USA) 9:33.48
15. Gesa Felicitas Krause (GER) 9:35.67
16. Xu Shuang-shuang (CHN) 9:49.80
High jump:
1. Mariya Kuchina (RUS) 2.04m
2. Vashti Cunningham (USA) 2.00
3. Yaroslava Mahuchikh (UKR) 2.00
4. Yuliya Levchenko (UKR) 1.95
5. Erika Viklund (SWE) 1.95
6. Levern Spencer (LCA) 1.92
7. Nicola McDermott (AUS) 1.88
Shot put
1. Gong Lijiao (CHN) 19.79m
2. Danniel Thomas (JAM) 19.26
3. Chase Ealey (USA) 19.23
4. Aliona Dubitskaya (BLR) 18.98
5. Christina Schwanitz (GER) 18.77
6. Michelle Carter (USA) 18.21
7. Magdalyn Ewen (USA) 18.04
8. Paulina Guba (POL) 17.54
9. Anita Márton (HUN) 17.46
