United have won 20 penalties in the Premier League since the start of last season, compared to 10 for their arch rivals, who they face on Sunday.
Ahead of the top-of-the-table showdown between the arch rivals at Anfield, Fernandes dismissed Klopp's spot-kick jibe as sour grapes.
“You always see what people say, but I really don't care," said Fernandes.
“I'm not focused on what they're saying. We have really quick players up front.
“It's normal that sometimes, because of that, they will be tripped and will fall and they gain penalties.
“People can talk and say what they want. But for me and the team, the main point is continuing to do the right things and when we get a penalty, just scoring.
Fernandes has scored 14 of 15 penalties since joining United and said his impressive conversion rate was down to technique and focus, rather than luck.
“For me, the main point is when we have a penalty, if I go to take the ball to the penalty spot, I have to do my job," said Fernandes.
“One thing I saw the other day was that Raheem Sterling has missed his last three penalties.
“So, yes, it shows it's not as easy to take a penalty as people say. You have to work on that, you have to be focused, you have to do your job.
“It doesn't mean Sterling isn't a good penalty taker because he missed three in a row. It can happen.
“It could maybe happen to me, but the important thing is to score and not to listen to what people say, because penalties are part of the game, for everyone."