5d3 AF does World Beach Volleyball so well

Few days ago shot some photos at World Beach Volleyball in Shanghai, 5D3 AF AI Servo Worked flawlessly. With little tweak in setting, it tracked action so well. Volleyball is a tough sport to shoot, you have the net in front, and player's movement is so quick and unpredictable (indoor volleyball is even worse), but my 99% of shots were in sharp focus, 1% miss focus were largely due to my own error. With accurate and reliable focus system, 6 fps speed, I'd say 5D3 is well qualified for peak action photography.

My lenses were 70-200 II + 1.4, 100-400.