That picture of Steffi with her pants down is fake, though she is still trying to win the point, even with her pants down, so there is a modicum of truth to it!
Martina looks hot here. With arms stretched out like that in that pose, it might make her look flat-chested, but I doubt she is. That sort of pose flattens the chest out. I've seen her on TV in top-hugging shirts, she has nice breasts, not of the Sandrine variety, but she holds her own on the tour.