Chesterfield manager Paul Cook praised his side's level of commitment as they racked up their third League Two win in a week.
Despite being under the cosh for most of Saturday's League Two clash at Plymouth Argyle, Cook's decision to introduce Luis Boa Morte and Jack Lester proved decisive as both players played a part in Marc Richards' winner, his second goal in five days after scoring in Tuesday's 4-1 home win over Cheltenham.
After winning 1-0 at Home Park, Cook said: "As you go through games, levels of performance are important. We put in a level of performance that was more through commitment than anything. That was the pleasing thing because Plymouth were good value for a point.
"Make no bones about it, Plymouth were very hard done by. We accept that but that happens in football. Plymouth put us under immense pressure, that's why we went 4-4-2 when it was 0-0 to try and win the game.
"I am not a tactical genius but what we do is evaluate a game and make decisions that we think may alter the game. I was able to put Luis Boa Morte on at half time, how lucky am I as a manager?
"You would not expect any difference from Marc or Jack Lester, when they get in those positions we know they will score goals. If we put supply in the box we know they will score."