Grayson said: "We kept going right until the end and maybe didn't deserve to get anything out of the game, but the other night at Cardiff we certainly deserved to get something and we didn't and that's football for you.
"It showed the desire of the team, the right-back still bombing forward in the 90th minute plus to try and get something for the team. Obviously he got the penalty and then Mr Cool stepped up and scored.
"I'm delighted he passed himself fit, there was a lot of speculation on Friday about him not playing, but even on Friday Jordan said he would have played if he was 100% fit but there was no point in risking him."
Next up for Huddersfield is a home match against Burnley on Saturday.