Olympic and world champion Caster Semenya of South Africa defended her 800m crown with meet record
The 20-year-old former world junior champion set a personal best to equal South Africa's Clarence Munyai for the top 2018 time and even shock himself.
Farah, who finished third in the London Marathon last month, deployed his famous finishing kick to surge past Uganda's Moses Kipsiro with 100 metres left to win in a time of 28 minutes 27 seconds.
Thompson's victory came 11 days after she pulled out of the Diamond League meeting in Shanghai with what meet organizers called a "physical issue."
Britain's Reece Prescod burst out of nowhere to upstage world champion Justin Gatlin in 100m
Abdulrahman Samba put up an impressive show to win 400m hurdles gold Doha Diamond League
Marie Jose Ta Lou of Ivory Coast stunned a high-profile field to win 100M gold.
A revamp to the competition schedule sees all morning sessions removed and split evening sessions introduced for the first time.
The AIU also rejected Kiprop's claim that he was offered a "reward" of being an IAAF ambassador on anti-doping in return for admitting to having taken the drug.
Qatar's world champion high jumper hopes to find motivation in going after records as new Diamond League season starts in Doha.
The rule has provoked fury in South Africa with officials and sports lovers describing it as "racist" and "sexist" and a deliberate attempt to target Caster Semenya.
The new testosterone rule covers only events from 400m to the mile because the IAAF's medical and science department says it has data showing an advantage for hyperandrogenous athletes over such distances.
Kiprop originally came second in the 1500m final at the 2008 Beijing Olympics but was upgraded when Rashid Ramzi was stripped of the gold medal for doping.
Six World and Olympic champions give Qatar schoolchildren a taste of track and field at Aspire Academy
Qatar’s Mutaz Barshim eyes even greater heights after enjoying his most successful season ever in 2017.