Interceptor achievement - easiest way to do it?

[danielpuia]

Hello!

I was trying to get the Interceptor achievement, which requires you to frag an opponent before crossing the finish line. I build a track with one lap and have been trying this forever with no luck! The closer to the finish line I was able to frag was like 100m /109yd before the end of the race. Do I need to get closer?
Does it work on built tracks or do I need to get it in the Shatter Bay events?

Thanks in advance!