Will Greenwood heaped praise on Northampton's power game after their last-gasp 26-24 victory over Wasps at Adams Park.
The hosts looked to be on course for a vital victory in the race for the top four, but instead it was Saints who edged closer to a semi-final spot after Christian Day scored a final-minute try in typical brutal fashion and Stephen Myler cooly slotted over the conversion.
All four of the visitor's tries came from rolling mauls and Sky Sports pundit applauded the work of Northampton's forwards after seeing them secure the bonus-point victory.
"Northampton will be absolutely over the moon to have won this against a fellow contender for one of those top four slots," said the former England ace.
"If you can stop Northampton's driving game you've got a good chance of beating them - the problem is it's blooming difficult to stop them! They're like a Roman legion with their shields above their heads, trudging forward.
"They don't run away from who they are and they understand that perhaps they haven't got the best backline in the world but they kept going, they kept it tight and they came away with a magnificent bonus-point win."
Dewi Morris was also impressed by Saints' driving force and, as a former scrum half, said he would relish having that forward power at his disposal.
"It's the power, power, power game of Northampton Saints and it's fantastic," he said.
"To be a scrum half behind this maul is great because it is outstanding. Wasps tried to stop it on three occasions and got three sin bins so spent 30 minutes down to 14 guys and you can't afford to do that.
"But Northampton Saints never know when they're down. They go back to what the like, they go back to the eight forwards that do the job for them and it's a crucial win for them."
The victory lifted Northampton up to third ahead of Leicester's evening trip to Exeter and Greenwood reckons if the Saints do make the semi-finals they could be a real threat.
"Saints are never going to be a backline like the All Blacks, or Gloucester when they're at their best but they can be effective," he said.
"If you make a semi-final you've got every chance. Semis tend to be tight, feisty affairs, confrontational and their mauling is an unbelievable strength."