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I'm trying to identify a short story I read some time in the nineties, and ideally the anthology it was in too. I was reading a lot of Asimov at the time, and it has a typically Asimovian twist at the end, but may not actually be by him.
A man in a small (?) craft is being chased by a bigger spaceship. The two are on opposite sides in a war. I think the man has stolen secrets of some kind. His craft is overpowered and he (crash?) lands on an asteroid. He expects to be captured but notes that the chasing ship is very unwieldy and overshoots. As it returns he is able to evade capture by walking round the asteroid so as continually be on the opposite side as the ship. Eventually an even bigger ship from his own side chases off the one he is avoiding and he is rescued.
The story is framed as being told by one old space-hand in a bar to two others. One of them (relatively young/junior, I think) dismisses it as a tall tale.
However the other listener recognised something about the storyteller and suspects he may be the disgraced spaceship captain who failed to catch a man in a spacesuit.