Summary The IAAF has asked sport's highest court to double to impose 4-year ban on Rita Jeptoo.
LAUSANNE (AP) - The IAAF has asked sport s highest court to double a two-year ban for doping imposed on Boston and Chicago Marathon winner Rita Jeptoo.
The Court of Arbitration for Sport says Jeptoo has also filed an appeal seeking to overturn her ban by Kenya s athletics federation.
Jeptoo tested positive for the blood-booster EPO last September, several weeks before winning her second straight Chicago Marathon title.
CAS says the International Association of Athletics Federations wants a four-year ban "due to aggravating circumstances."
The court says Jeptoo wants an interim decision freezing her sanction to let her "participate in IAAF competitions" during the appeals process. The world championships are Aug. 22-30 in Beijing.
Athletics Kenya suspended Jeptoo from all competition until Oct. 29, 2016.
CAS says no timetable is set for the case.
