That battle for time does not only belong to the players. It also belongs to the eye. Watching Wimbledon at this level is visually demanding in a way spectators often underestimate. During a rally, the eye has to follow speed, spin, height and direction while constantly refocusing between the ball, the player, the lines and the court. Then, between points, the visual field changes again: white clothing, green grass, scoreboards, sunlight, shadow, faces. The fatigue builds gradually. Even the tennis ball tells part of the story. Until 1986, Wimbledon used white balls. The switch to optic yellow was made primarily because television cameras could follow the ball more easily, but it also improved contrast for spectators inside the stadium. Against ryegrass, the yellow ball is acquired faster by the eye. A small change in colour altered how the game was seen, both on screen and inside Centre Court itself.