Jamaican sprinter Nesta Carter has testified at the Court of Arbitration for Sport to appeal against disqualification from the 2008 Olympics in a doping case that cost, the now retired, Usain Bolt a 4x100m relay gold medal.

The court said lawyers for Carter and the International Olympic Committee would submit further documents to the judging panel, which was expected to reach a verdict early in 2018.

The 32-year-old Carter is challenging his disqualification imposed by the IOC for a positive test for a banned stimulant.

Carter, who shielded his face from media on arriving at sport’s highest court on Wednesday, tested positive for methylhexaneamine last year in a reanalysis program of samples from the 2008 and 2012 Olympics.

The case spoiled Bolt’s perfect Olympic record of three gold medals — in the 100m, 200m and 4x100m — at three consecutive Games from 2008 through 2016.

Carter and Bolt were relay teammates in Beijing, where Jamaica won in a world record of 37.10 seconds. Carter ran the opening leg, and Bolt took the baton third in a team that also included Michael Frater and Asafa Powell.

Carter also teamed with Bolt on three straight world championships relay-winning teams, from 2011 through 2015. They were also teammates when Jamaica set another 4x100m world record at the 2012 London Games, running 36.84.