Welsh swimmer Marco Loughran has missed out on qualifying for the men's 200m backstroke semi-finals in the Olympics.
Loughran, whose father is from Caerleon, failed to make it into the top 16 qualifiers with a time of 1:58.72.
The 23 year old finished 7th in his heat and 18th overall, with the top 16 progressing to this evening's semis.
He was the fourth Welsh athlete to go into action in the pool after Georgia Davies, Ieuan Lloyd, and Jemma Lowe.
Georgia Davies failed to make the women's 100m backstroke finals after coming 15th in the semis on Saturday.
And Ieuan Davies was edged out of competition for the men's 200m freestyle in his heat on Sunday.
Welsh double Olympic medallist David Davies will make his first appearance in the pool on Friday in his men's 1500m freestyle heat.
But all eyes will be on Jemma Lowe this evening in her bid to become Wales' first medallist of the London games when she competes in the final of the 200m butterfly.
The 22 year old qualified in the 8th and final position for this evening's race, meaning she'll race in an outside lane. But Lowe - who's twice represented Wales at the Commonwealth Games - says she's kept enough in reserve for tonight.
The final begins at 8:09pm