Neurofeedback in Sports Psychology is a tool used as supplementary training of psychological skills in athletes with the purpose of improving sports performance levels. This research aimed to investigate the effectiveness of an intervention using the Neurofeedback technique to improve the cognitive and sports performance of a ten-meter air pistol shooter. For this purpose, the method used was the individualized TLC protocol developed by Peter Van Deusen, in an adapted intensive version. The intensive protocol consisted of six five-hour sessions with weekly frequency. The results revealed that the improvement in sports performance initially hypothesized was not statistically significant. On the other hand, there was an improvement in cognitive capacity, specifically problem solving. Regarding the data collected from the quantitative electroencephalogram, the data measured and compared before, during and after the intervention also did not show statistically significant changes. The conclusion that these findings allow is that, specifically for this athlete, the intensive TLC protocol did not contribute to any modification of sports performance and was limited in cognitive terms for this particular athlete.