Vavi judgment due today
The suspended Cosatu general secretary will find out this morning if his suspension will be set aside.
The South Gauteng High Court in Johannesburg is expected to hand down judgment in the matter this morning.
Vavi was placed on 'special leave' in August last year after admitting to having sex with a junior employee in the federation's headquarters.
He claims Cosatu's constitution was not adhered to when the decision was taken.
But Cosatu's leaders claim there was no basis for the allegations, saying Vavi tried to isolate the collective following their decision.
It's understood that Vavi won't be in court this morning.
Cosatu maintains the process to suspend Vavi was fair.
The National Union of Metalworkers of South Africa (Numsa) has supported Vavi since news of his suspension emerged.
Last week, Numsa said if the court ruled in Vavi's favour, action should be taken against Cosatu's national office bearers who suspended him.
Numsa will also find out next week if its application to have a disciplinary hearing against Vavi scrapped is successful.