Green book trading, a strategy commonly used in sports betting, can indeed be applied to tennis. This involves placing multiple bets on different outcomes of a match to ensure a guaranteed profit, regardless of the result. By analyzing odds, market movements, and player performance, a trader can back (bet for) one player and lay (bet against) that same player or their opponent at different points, often during live matches, when odds fluctuate. This approach allows traders to "green up," achieving a balanced profit across outcomes, thus minimizing risk while capitalizing on the inherent unpredictability of tennis matches. However, successful green book trading requires a deep understanding of the sport, as well as effective bankroll management and timing.