This lesson covers serving techniques in doubles, emphasizing the importance of serving down the middle and adjusting serves to exploit opponents' weaknesses, particularly targeting the backhand. The coach shares tips on first and second serve strategies, including how to toss the ball differently for each type of serve. The lesson also introduces the "third link" concept, a critical technique for improving shot accuracy and power, particularly in forehands, backhands, volleys, and serves. The coach underscores the importance of understanding body mechanics and recovery steps during drills.