Widnes boss Frank Endacott praised his side after they beat Warrington 12-6 in a re-arranged friendly originally scheduled for Boxing Day.
"I was pleased with how we stuck to our task and hung in right to the end and I thought our defence was great," said Endacott.
"I thought both sides showed a lot of commitment and it was a tough match for the first one of the year."
Warrington coach Paul Cullen had elected to field a youthful squad against the Vikings, and was equally impressed with his troops.
"I thought defensively, for the vast majority of the game, we were outstanding," he said.
"The Academy players who took on the challenge went very well and I am very pleased how they took on a strong and experienced Widnes side and didn't back down."