Welsh athlete Christian Malcolm went through the 200 metres heats in second place, clocking a time of 20.59.
But James Ellington was unable to join him as he went out, finishing sixth in his heat in 21.23.
"I expected a little bit more, but I'm not an early morning person and the main thing is to qualify," said Malcolm.
Ellington said: "I don't know what happened. That is the slowest time I have run this year. No excuses, it is rubbish."