With left-hander Tom Andrews (Photo: Trevor Hyde) in fine shooting form, Croydon recovered from 6-4 down to take a brief lead at 7-6. Croydon goalie Tom McKay then saved a Durham penalty, followed immediately by a Durham equaliser - from another left-hander, Ashley Lyne.
The final period saw both teams take time-outs. Croydon finally won through with two more fine goals from Andrews, taking his match tally to six.
Durham's defeat left Southampton as the only team with a 100 per cent record from four games. They beat Birmingham 16-6.
Games between Newport and the British Army always tend to produce cliffhanger finishes - and today's game was no exception. The Welsh team charged into a 4-0 lead but the Army gradually fought back and, late on, wiped out a 10-7 deficit to win 12-10 with goals by Joe Hood, Bill Smyth (2), Adam Hanson and Mike Mathers.
Rotherham Metro topped 20 goals for the second time in the day - this time beating Newport 22-11. Ben Alderson helped himself to 13 goals in the two matches.