A South African fast food outlet, Nando's has strike haters of Caster Semenya, with a simple message.

In a post shared to Facebook on Thursday, the restaurant shared the following message and picture:

Caster Mokgadi Semenya, they couldn’t take your heat, so they redid the kitchen.

This comes after Semenya on Wednesday lost her court challenge against IAAF rules forcing female athletes to regulate their testosterone levels.

The decision by the Court of Arbitration for Sport (CAS) means that women with elevated testosterone will have to take suppressive treatment if they wish to compete against women in certain events.

The regulations will only apply to distances from 400m to one mile (1 600m) and will come into effect from Wednesday, May 8, 2019.

Semenya, however, can appeal the decision at a Swiss tribunal within 30 days. Her legal team has confirmed they are considering their options.

Semenya is expected to take part in the 800m at the first IAAF Diamond League meeting of the season in Doha on Friday (19:07 SA time).