Paralympian Oscar Pistorius is seen at the Pretoria Magistrate's Court on Friday, 22 February 2013 following the murder of his girlfriend. Pistorius was granted bail. Picture: Werner Beukes/SAPA

Johannesburg - A legal showdown is looming in the Supreme Court of Appeal (SCA) in Bloemfontein on Friday as prosecutors will argue why paralympian Oscar Pistorius should be given a longer sentence.

Pistorius shot and killed his model girlfriend through a toilet door on Valentine's Day in 2013.

Last year the SCA overturned Pistorius' conviction of culpable homicide by Pretoria High Court Judge Thokozile Masipa in 2014 and found him guilty of murder. 

On Friday, prosecutors will ask the court to amend his six-year-sentence to 15 years in jail.

But Pistorius'  defence team is expected to argue that the athlete has already spent a considerable time behind bars, since his imprisonment in 2014.

During his trial, Pistorius was adamant that he believed that there had been an intruder in his his house and fired four shots through the bathroom door. 

Pistorious is currently serving his sentence in the Atteridgeville prison after he was moved from Kgosi Mampuru II.

The Saturday Star