KO of the week: Tyson Jeffries vs. Arthur Guseinov *VIDEO*

Team Quest middleweight Tyson Jeffries (7-6) found himself on the wrong end of a Arthur Guseinov (8-2) spinning backfist at 1:52 of the first round Friday night at M-1 Challenge 26 in Costa Mesa, Calif.

It was a much needed win for the Russian fighter who was coming off back-to-back submission losses in 2010.

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