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American Galen Rupp hopes to beat British training partner Mo Farah at this summer's World Championships in Moscow.
Rupp won Olympic 10,000m silver behind Farah on Super Saturday at London 2012.
Double Olympic champion Farah recently admitted he had work to do to catch up with Rupp after enjoying himself post-London 2012, with August's IAAF World Championships in Moscow the season's major goal.
Despite appearing to close in on Farah in the final metres of the 10,000m final six months ago, Rupp believes his training partner was nigh-on unbeatable in 2012.
The 26-year-old from Portland, Oregon hopes he and Farah are clear of the field again in 2013 and can challenge each other for world gold.
Rupp, who will compete at the British Athletics Grand Prix at Birmingham's National Indoor Arena on February 16, said: "I'm not sure I would've caught him.
"Watching back I wish I had started my kick a little bit earlier, from 300m out. I let him get a little bit of a gap.
"Even if I had done that, I'm not sure I would've beaten him.
"Mo was on another level from anybody last year; I'm not sure if that would've made a difference.
"Whenever you enter a race you want to win. We concern ourselves with trying to work together to beat everybody else.
"If we do that, which we were fortunate enough to do last year, we both want to win the race and we'll both try our best to beat the other."
Rupp praised the selfless attitude to training of Farah, who has been training in Iten in Kenya at the British Athletics endurance camp.
Farah will contest the 3,000m indoor in Birmingham later this month, where Rupp will also compete, before the duo begin preparations for the outdoor season together.
"Hopefully this is going to set us up well going into the outdoor season," added Rupp, who insisted a competitive rivalry would not impact on their friendship.
"We have a great time running together. We're looking forward to getting back together after Birmingham and resuming training and getting ready for the summer together."
Rupp's schedule for the outdoor season is still to be determined, but he would like to run at July's Diamond League meeting in London, the first event to take place there since the Olympics.
"I'd love to run there again," he said.
"I had a great time there last summer, it's a fast track. I'm sure the atmosphere's going to be great there.
"It's really cool they were able to move that into the Olympic Stadium."