Allyson Felix won the women’s 400m at the US athletics championships in Oregon, on Saturday, and said she would decide soon if she would attempt a 200m-400m double at the 2011 World Championships in August.

“Hopefully pretty soon,” Felix said of when a decision would come on the daunting double.

Felix, the three-time defending 200m world champion, remains concerned that contesting the 400m prior to the 200m at the World Championships in Daegu, August 27-September 4 could jeopardise her chances in her favourite event.

In the meantime, however, she was savouring her 400m victory, which made her the first US woman to win national titles at 100m, 200m and 400m in a career.

Felix powered through the finish to win in 50.40sec.

In windy conditions, she couldn’t match her 2011 world-leading 49.81sec, but she had plenty in the tank to beat Francena McCorory (50.49) and indoor world champion Debbie Dunn (50.70).

“I knew this was going to be racing home,” Felix said.

“I wanted to be in position to use my speed.”

In the men’s 400m, university student Tony McQuay gave veteran Jeremy Wariner a glimpse of the future as the latter tries to turn back the clock.

McQuay, a 21-year-old who was runner-up in the US collegiate championships 400m this year, surged past a fading Wariner in the final straight to win in 44.68sec.

Wariner held on to take second in 44.98, but just barely as third went to Greg Nixon in the same time as all three booked their Daegu berths.

“My goal was to win the US title. I wasn’t able to do that,” said Wariner, who was pleased with his race despite the defeat.

“My second goal was to make the US team. My main goal is to win at the World Championships.”

McQuay made it clear he would not be in awe of his more experienced rivals or the grand World Championships stage.

“Hopefully, I’ll get a win there, too!” said McQuay, who has one other lofty goal... the world record of 43.18 set by Michael Johnson way back in 1999.

“I’ve got my mind set on that,” he said.