Jez George wants his Cambridge United players to follow the example of Kevin Roberts as the club seek to regain their early season form.
The U's boss was speaking in the wake of their shock FA Trophy quarter-final loss to Wealdstone, with right-back Roberts linking up with England C shortly after for Tuesday's 1-1 draw with Italy in the International Challenge Trophy action.
"I'm glad he's not here for the aftermath because he doesn't deserve to be," George told Cambridge News. "He's an example of what can happen when you want to improve your game, and what working hard can do for you.
"What I'm trying to explain to the players is that you have to want to get better, and you have to have that attitude all the time.
"We had success for a three-month spell by having a real work ethic and with all 11 doing it all the time, and understanding how important that work ethic was.
"At the start of the season we were really hard to play against. Were we the most exciting or expansive team in the world? No, but nobody wanted to play against us.
"We can't change the result, but we have to make sure after the pain and disappointment we suffered that a line is drawn in the sand."
The 12th-placed U's next visit Forest Green Rovers in the Blue Square Bet Premier on Saturday.