Gareth Taylor scored the only goal of the game, after Calvin Zola chased down a clearance from visiting keeper Julien Baudet, to give the home side al three points.
Gradi insisted his side were not totally outclassed, but admitted their front-line wasted any good work from the rest of his team.
"We looked dangerous and confident at times and worked hard," he said.
"We played some good football but could not quite find the quality in front of goal.
"We might have salvaged something from the game and probably deserved to do so but we did not enjoy a lot of good fortune."