LONDON – An accidental headbutt led to the fight-ending sequence for Joel Alvarez . After a back-and-forth first round on the feet, Alvarez (20-3 MMA, 5-2 UFC) and Marc Diakiese (16-7 MMA, 7-7 UFC) hit the mat in Round 2. However, with less than a minute left in the round, Alvarez capitalized on an accidental clash of heads by moving in for the kill
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