The Latest: Aiming for another sprint double, Usain Bolt advances in 200 metres at worlds

BEIJING _ The Latest from the world championships (all times local):

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7:45 p.m.

Usain Bolt cruised through the opening round of the 200 metres in 20.28 seconds on Tuesday, starting the second phase of his bid for another sprint double at the Bird’s Nest two days after retaining his 100 world title.

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7:35 p.m.

Allyson Felix produced one of her trademark smooth runs to coast into the final of the 400 metres, where she can earn ninth gold medal of the world championships and match the total of Usain Bolt.

Ten years after she won her first gold, a 200-meter title in Helsinki, she proved she lost little of her speed, easing up at the line to cross in 49.89 seconds, her top time this season.

She was the only competitor to beat the 50-second mark, with Shericka Jackson coming in second at 50.03 seconds. Shaunae Miller of the Bahamas won the first semifinal heat in 50.12, ahead of Christine Day of Jamaica in 50.82.

Defending champion Christine Ohuruogu of Britain won the second semifinal heat in 50.16.

The final is Thursday.

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6:25 p.m.

If Ashton Eaton looks cool under pressure in the decathlon at the world championships, it’s because he is.

The Olympic champion and world-record holder will wear a specially designed cooling hood over the two-day competition that begins Friday. Researchers for his sponsor, Nike, came up with a cap that contains inner layers that are designed to keep water cool without leaking. Eaton plans to don the white hat in between events.

“At the beginning, I thought, ‘No way this is going to be cool,”’ said Eaton, whose wife, Brianne Theisen-Easton, won silver in the heptathlon. “After one rendition, they turned it into something awesome. I used it in training and I liked it a lot.”

How much it will help from a physiology standpoint remains to be seen. But the psychological ramifications could be immense, especially on a hot day, Eaton said.

It’s being playfully dubbed “10,000 points.” As in, maybe the product will lead to someone reaching that point total. Eaton’s world record is currently at 9,039 points _ a long way from the 10,000 plateau.