Ireland's Lara Gillespie finished tenth in the women's track cycling omnium, with victory going to the USA's Jennifer Valente.
Gillespie, who landed the tempo race (the second of four in all) after being the only rider to lap the entire field, finished on 99 points.
Valente headed the standings on 144 points, with Daria Pikulik for Poland taking silver (131) and New Zealand's Ally Wollaston (125) claiming the bronze.
Enniskerry native Gillespie was fifth going into the final points race and added 20 to her tally after lapping a competitor (below), and then three more in sprints, pushing her up to fourth at one point.
She could not, however, add to her tally thereafter and started to drop down the standings, but can be pleased with an effort that also saw her perform strongly in the elimination race.
Afterwards, the 23-year-old Olympic debutant told RTÉ Sport: "I was hoping for more, of course. But I gave everything I could. I'm proud of my race because I raced quite gutsily and bravely.
"The scratch was not a good race. I got boxed in. I love the tempo race. I was happy with that.
"I was hoping for a top-five result here but I am proud of how I raced. I was brave. I took chances. I gave everything there. The last few laps, I was in so much pain. I had a really bad pain in my stomach. I really gave everything to put my best foot forward.
"I believe I can get a medal one day. I'm still learning, I'm still progressing.
"I think everyone here, except maybe four girls, have medals at World Championships, European Championships and Olympics so it's really cool to be a part of it and I can do better in four years."
