Richards accepts he went missing during the dramatic derby defeat at Manchester United earlier this season.
"The United game ... you switch off for one second and Owen scores," he told the Sunday Times. "It just shows you. Right now I tend to rely on my pace and power a bit too much. If I can add more concentration into my game it will make me a better package. Mark Hughes is very good at giving the defence drills and I've told him [concentration and positioning] is an area I want to improve. He's said, 'You've got the ability, it's just about fine-tuning your game'."