Team GB occupied four of the top six spots during the women's 200m breaststroke qualifying in Baku this morning, but only Layla Black and Georgia Coates made the semi-finals.
No more than two swimmers from one nation can reach the semis, meaning that it was heartbreak for Abbie Wood and Emma Cain, who narrowly missed out.
Black clocked a time of 2:28.71 in the fourth heat to qualify second overall, while Coates (2:28.75) was just behind in third.
Wood, who won gold in the 400m individual medley yesterday, and Cain finished fifth and sixth overall in qualifying, after times of 2:29.03 and 2:29.82 respectively.
The British pair of Wood and Cain may be battling for silver this afternoon, as Russia's Maria Astashkina (2:25.54) finished more than three seconds ahead of the pack.