To profit from betting on underdog players in non-Grand Slam tournaments, focus on conducting thorough research to identify players showing recent improvement or favorable matchups against higher-ranked opponents. Analyze statistics such as head-to-head records, playing styles, and surface preferences that may favor the underdog. Additionally, monitor factors like player form, physical condition, and motivation levels, as these can significantly influence performance. Look for opportunities with inflated odds due to public perception favoring well-known players; this can create value bets on undervalued underdogs. Lastly, consider employing a stake management strategy to minimize losses and maximize potential gains, ensuring you remain disciplined and do not chase losses recklessly.