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Callum Johnson's brave world title attempt ended in a fourth-round knockout defeat to Artur Beterbiev after both men were floored in an exciting firefight. The British light-heavyweight was down inside the opening round but then floored IBF title holder Beterbiev in the second. But the heavy-handed champion ended his challenge with a destructive stoppage at the Wintrust Arena in Chicago. Taking the centre of the ring, Johnson quickly gained Beterbiev's attention with an overhand right, but he became entangled in the ropes and was clubbed to the canvas by a left hook. Johnson produced a stunning response in the second as he floored Beterbiev with a looping left hand of his own, although he was unable to find another telling blow before the end of the round.
