Parker has come back from being knocked down less than 10 seconds into the first round to score a split decision points victory in Manchester, England on Sunday (NZ time).
In what was a close bout throughout the 12 rounds, the former WBO world champion was the stronger of the two fighters in the second half of the contest, doing just enough to notch his fifth straight win.
Parker won the fight 116-111 and 115-113 on two of the three judges' scorecards, with the other judge scoring it 115-113 for Chisora.
