Question: I'm looking for a site that offers detailed head-to-head stats and match analysis for informed betting decisions in tennis and football.

If you're looking for a site that can give you detailed head-to-head statistics and match analysis for making more informed bets in tennis and football, Matchstat is a great option. This AI-based service offers expert predictions, advice and statistics for both sports, including head-to-head match analysis. It covers all professional levels of tennis tournaments and nearly 2000 leagues around the world, so it's a good option if you're looking for a one-stop shop for your betting needs. The service uses machine learning algorithms to analyze factors like player form and head-to-head records, and offers personalized advice by email or live chat.

Another powerful option is Stats Perform, which marries 6.5 petabytes of proprietary sports data with AI models for detailed insights. Although its main business is with media and fantasy services, it offers integrated data for predictive models and actionable advice that can be useful for betting. With more than 500,000 matches per year and 3,900 competitions around the world, it's got plenty of data to help you place your bets.

If you need live, real-time data and a rich set of APIs, SportsDataIO is another option. The service offers scores, statistics, schedules and results for a variety of sports, including tennis and soccer. It also offers aggregated odds, fantasy data, news and images through a powerful set of APIs and predictive engines. It's geared more for developers and data-driven services, but its rich toolset can be useful for anyone who wants to track and analyze sports data for betting.

Last, COPA is a football companion app that uses AI to offer predictive insights and real-time statistics. It offers features like AI-powered match predictions, pre-match statistics and a Score Centre for live scores and analytics. With support for more than 20 leagues, COPA offers a lot of data and insights to help you make informed football betting decisions.