As reported by Newshub:
Parker, 24, went into the bout as favourite against his towering foe and did not disappoint, landing flurry after flurry of quick punches to leave Dimitrenko gasping for air.
He then proceeded to finish him off early in the third round with a right body blow to the flank.
The Auckland-born Parker, who now carries an enviable career record of 21-0, hit Dimitrenko hard and early in the first round with quick and powerful combinations to the body.
A left hook to the body put Dimitrenko on the canvas within two minutes, causing the 201cm Ukrainian to play defensive as the first round drew to a close.
Dimitrenko came out with venom in the second round, throwing a number of left- handed punches, before Parker knocked him to the ground again with a right overhand followed by body blows.
Parker subsequently missed a punch only to put Dimitrenko on the ground for a third time when his bicep followed through and hit his opponent in the face.
In the third round, Parker hit Dimitrenko with a right body blow to the flank that left the Ukrainian writhing in agony and forcing referee Marlon Wright to call time on the fight.
Parker will now continue on towards an IBF title bout in November or March against Anthony Joshua, or a WBO title fight in the summer.
"I'm glad we got the victory, I'm happy," Parker said immediately after the fight.
Dimitrenko, who never looked in the fight, has now lost his chance to pinch Parker's position as mandatory challenger to Joshua.
Meanwhile, in the undercard fights, former Bachelor contestant Naz Khanjani won by unanimous verdict over Bella Henry while Parker's younger brother John defeated Ratu Dawai by split decision.
Polish gun Izu Ugonoh made short work of Frenchman Gregory Tony, knocking him out in the second round with a thumping right overhand followed by a left body shot.
Kiwi Brown Buttabean edged American big-hitter Clarence Tillman by unanimous verdict, while NZNBF welterweight champ Bowyn Morgan also won unanimously over Gunnar Jackson.
In the final undercard match-up before Parker's victory, powerful Kiwi Junior Fa defeated Samoan Alapati A'asa by unanimous decision.