Warren Weir - file

Olympic 200m bronze medallist Warren Weir upstaged his more celebrated training partners Usain Bolt and Yohan Blake at Saturday's Camperdown Classic, inside the National Stadium, winning the 400m time trial, with a 46.21 personal-best run.

Weir, who was paired with Blake in heat three, held off Edino Steele, 46.64 and the 100m world champion Blake, 46.77; showing much-improved strength and speed endurance on the home stretch.

It's just the sort of improvement that Weir was hoping for in a year where he will be strongly tested to firstly make Jamaica's IAAF World Championships team and secondly repeat or better his Olympic feat at the Moscow championships set for August 10-18.

"I managed to finished strongly and I am very pleased about that," Weir said.

"I must firstly give thanks that it was an injury-free race, secondly, for my personal best; at least I know that I am stronger and fitter than last year and I am where I am supposed to be, so it was a good outing."

"Speed endurance for me is one of the main things because you can be very fast in the 200m but if you don't have speed endurance, you won't do well in the event. This is showing me that I am where I am supposed to be and it will be a good season," Weir added.

Weir's previous best over the distance was a pedestrian 47.07, but with another big improvement over an unfamiliar distance, the Racers Track Club athlete, who only switched to the 200m in 2011, is not too concerned about putting any quarter-mile ideas in his coach Glen Mills' head.