Oftentimes, it seems as though the spectators may be discussing two separate events. The most popular analysis seems to be poor use of strategy, usually on behalf of the loser. Unfortunately, few realize that success in junior tennis comes primarily from sound strokes, proper attitudes, talent, and years of tournament experience. Only then will strategy come into play.
Strategy is a complex topic.
One aspect is the same for all players, as the court is bounded by the same dimensions and laws of physics. Both works deal with the objective nature of strategy, ie. The other part of strategy has to do with the subjective, an individual player's strengths and weaknesses. For example, what may be considered good strategy for Ivan Lendl may not be the same for Jimmy Connors. Lendl may choose to play the big point by staying back and pounding heavy groundstrokes.