To effectively manage risk when betting on tennis accumulators, consider diversifying your selections by betting on matches from different tournaments or involving players at various skill levels, which can help mitigate the impact of any single loss. Additionally, limit the number of legs in your accumulator to 3-5 matches, as higher numbers exponentially increase the risk of losing the bet. Implement a strict bankroll management strategy by only wagering a small percentage of your total funds on each accumulator, and utilize value betting by analyzing odds to identify underpriced matches or outcomes. Keeping up with player form, injuries, and surface preferences can also inform better decision-making, while setting realistic expectations for potential returns can help maintain discipline and reduce emotional betting.