Neural networks play a significant role in tennis betting models by leveraging their ability to process vast amounts of data and identify complex patterns within it. By analyzing historical match statistics, player performance metrics, head-to-head records, and external factors like surface type and weather conditions, neural networks can generate predictive insights regarding match outcomes and player probabilities. Their capacity for learning nonlinear relationships allows them to adapt to evolving trends in player performance, thereby enhancing the accuracy of betting predictions over time.