Martyn Irvine lies tenth overall after the first three events in the six element Omnium, in track cycling.
He was placed ninth in the flying lap in a time of 13.504 which was a tenth of a second below his PB.
He fared somehat better in the points race, coming sixth, picking up 40 bonus points for lapping the field and a further seven in the sprints.
The final event of the day was the elimination race, his weakest discipline, and he was the fourth rider to be eliminated to leave him 15th.
Irvine is on a cumulative total of 30 points, 16 behind the bronze medal position Held by World Champiion Glenn O'Shea.
Italian Rider Elia Viviana is in second place while French Rider Bryan Coquard, who won the elimination race, is leading on 10 points.
Sunday sees the 10K pursuit at 10.00am, followed the 15K scratch race at 5.00pm and the 1 Kilometre time trial at 6.15pm.
Speaking after the race, Martyn said: "It was a reality kick.
"My aim was to be top six or seven going into the last day and I feel a medal for me was doable.
"You dream of a medal, there's a lot of hard work and you hope for the best but it isn't to be.
"In the endurance side I feel I've been at my best and right up there but it's just about tactics and my rider-type lets me down. I'm not a sprinter and that's what the elimination race needs.
"Bunch racing and sprinting lets me down a heap."
Although Irvine was clearly upset as he left the track, he has vowed to prove his quality when tomorrow's events - the 4km pursuit, the 15km scratch race and the one kilometre time-trial - get under way.
"I'll give myself a shake, get up and put a bit of fire in my belly and for tomorrow," he said.
"Tomorrow is my stronger day. I know I can climb a few places, I'm always in the top four or six for the strength and endurance events."