THIS was a game to really test the physical and mental capacity of Muirhevnamor in an exacting week in which several of their players have been asked to play four games.
Five of the players were involved in the Dundalk Summer League Cup final the night before that went to extra-time - just two days after the team played in the FAI Junior Cup in Dublin.
If that was not enough 18 year-old Ryan Duffy suffered a suspected fractured collar bone and was taken to hospital by ambulance, which held up the game for 20 minutes.
They also were reduced to ten players and played for over half the game with a player short with Jimmy Cooney dismissed after 33 minutes.
But apparently the more the adversity the better for the Premier Division newcomers as they extended their unbeaten start to the league, chalking up their third win in four matches, with the other a draw, to join temporarily promoted counterparts Boyne Harps at the top of the table.
Navan had shown they were a force to contend with, beating the champions Rock convincingly at the latter's ground. However, Muirhevnamor gained their measure and devised a way to neutralise their dangerous and speedy strikers.
Ryan Dillon who notched a double along with Thomas McShane stabbed them in front after ten minutes when a scramble ensued in the visitors' goalmouth following a corner.
Navan equalised with a cracking goal, but Ryan Dillon headed Muirhevnamor back in front from a free-kick by Jimmy Cooney.
Minutes after Cooney's dismissal Dillon increased the home side's lead. Again it followed a corner that Navan struggled to clear. Sean Conlon's shot was blocked and Dillon put away the loose ball.
The winners really worked hard in the second-half to frustrate Navan who eventually ran out of ideas to try and find a way through their defence, and ten minutes from time McShane wrapped up victory.
Another corner kick posed a problem for the visitors and when the ball spun off the head of a defender, McShane was left with a free header from close range and made not mistake.
Muirhevnamor: David Cooney, Derek McCabe, Adrian Rafferty, Shane O'Callaghan, Brian Begley, Ryan Duffy (Sean Conlon), Jimmy Cooney, Thomas McShane, Philip Duffy (Anto Reilly 53), Ryan Dillon, Brendan Hughes.