It was an in-house battle the Northland Roller Derby team on Saturday as they prepare for the New Zealand Derby Top 10 Champs in Tauranga in October.
The 18-strong regional team split into two to put on a hard-fought match - clocking up a few bruises no doubt - with Pop versus Rock at McKay Stadium in Kensington.
Their skating prowess showcase was followed by a match between their 12 junior roller derby players - again split into two.
Team Rock claimed victory in both bouts.