She has already had her ban provisionally lifted ahead of the hearing in order to mount a bid to achieve a qualifying time for next month's Olympic Games in Rio de Janeiro. 

Çakır was stripped of the Olympic title she won four years ago because of abnormalities with blood levels found in her athlete biological passport (ABP) readings in 2013.

She had reached an agreement with the International Association of Athletics Federations (IAAF) last year and agreed to an eight-year suspension due to finish in 2021. 

As part of the deal, the 30-year-old forfeited all her results recorded since July 29 in 2010 and also had to return her gold medal from 2012 European Championship in Helsinki

Çakırv who also served a two-year doping ban in 2004, has subsequently cooperated with the World Anti-Doping Agency (WADA) Independent Commission investigation.

She revealed that, in 2012, she had been told by the sons of former IAAF President Lamine Diack she could keep her Olympic gold medal if she paid them bribe of €650,000 (£490,000/$700,000).

Çakır, whose case is specifically against WADA rather than the IAAF, is claiming now that because she has helped with the WADA Independent Commission she should receive a more lenient ban.

It is not clear what exact reduction she is hoping for, but the fact she was allowed to return provisionally to pursue an Olympic qualifying suggests she hopes it will end now, having served just three of her eight year suspension.

"We can confirm that it is CAS who have provisionally lifted the suspension until July 5 and allowed her to compete pending the hearing which is July 4," an IAAF spokesperson told insidethegames today. 

"There is nothing else to say at this stage since we are waiting the decision of CAS."

Çakır made her return in Istanbul last Tuesday (June 28), running 4min 19.70sec for 1500m. 

This more than 12 seconds slower than Olympic qualifying standard of 4:07:00.

It was also 23 seconds slower than her fastest time of 3:56.62 set at the Paris Diamond League event in 2012, a performance now erased from the record books. 

Çakır told Turkish reporters afterwards that she is confident she can return to that standard. 

According to website bugun.com, the Olympics is her "first target" but she is also aiming for future editions of the World and European Championships, as well as the Mediterranean Games in Tarragona next year.

"I will seek medals at the highest level in a year - [this is] my main goal," she said.

If CAS rule in her favour, the case will set a major precedent of rewarding athletes caught doping who then provide vital information to the authorities that helps them catch other people.

Another drugs cheat, Russian 800m runner Yuliya Stepanova, has already been granted permission to compete internationally by the IAAF after she provided evidence leading to the suspension last November of the All-Russia Athletic Federation for systemic doping.

She is due to take part as a neutral athlete at the European Championships, which are due to begin in Amsterdam on Wednesday (July 6). 

That decision raised eyebrows, however - in Russia but also elsewhere - and a similar verdict regarding Çakır would likely raise even more questions. 

It is not clear exactly where the IAAF and WADA stand on the case.

Çakır's compatriot Gamze Bulut has also now been implicated in a doping scandal after placing second in the London 2012 1500m final.

A number of other athletes in that race have also been linked with doping. 

Russia's Tatyana Tomashova, fourth in that race, served a two-year doping ban from 2008.

The fifth-placed Abeba Aregawi, Sweden's Ethiopian-born runner, meanwhile, failed a test for meldonium earlier this year.

Seventh-placed Natallia Kareiva of Belarus was banned in 2014 following abnormalities in her ABP and ninth-placed Russian Ekaterina Kostetskaya was also also given a two-year sanction in the same year.