There is a book I bought many years ago called "Asian Fighting Arts" By Donn F. Draeger and Robert W. Smith. that went out of print, but I believe it was reprinted as "Comprehensive Asian Fighting Arts (Bushido--The Way of the Warrior)"
It has several stories in it about fights by Chinese martial artists.
There are many from Xingyi.
1 "story" is about Kuo Yun-shen who was the first student of Li Neng-jen. Kuo had a punch so powerful he killed a person he was fighting, this landed him in jail, where he continued to train. When he got out he modified his punch so he would not kill anyone. He would put the back of his other hand against his opponent to help absorb the blow. He was supposedly only defeated twice. Once by another Xingyi guy, a fellow student of Li Neng-jen, Ch'e I-Chai. During the fight Ch'e evaded Kuo's punch and lightly taped Kuo's shoulder, saying what's your hurry. Kuo stopped fighting. The second was Tung Ha'i Chuan. Tung and Kuo fought for 2 days and Kuo could not penetrate Tung's circular defense. On the third day Tung went on the offensive. Tung defeated Kuo without hurting him.
How true all of these stories are I do not know, but the book is a good reference book on Martial Arts.
Tai Chi - from a Yang Lineage website.
Yang Ban Hou (1837-1892) was the second child of Yang Lu Chan
There was one time when a martial arts master nicknamed Man with 10,000 Pounds of Strength came to Beijing to challenge Yang Lu Chan. After the Yang family heard of the news, Yang Lu Chan did not pay much attention to the matter. However, Yang Ban Hou said to his father that if our store has something to sell and people want to buy it, why don't we sell? What Ban Hou meant was that his family had true martial ability, so why not take the challenge. Consequently, Ban Hou went by himself to take the challenge from the man. When the contest began, the man threw his shirt off and showed his muscles to the crowd. Yang Ban Hou with his skinny body just stood waiting for the man to attack. When the fight commenced, the only image seen was the man pouncing toward Ban Hou. Ban Hou evaded the attack. The man immediately attacked with continuous strikes to Ban Hou's face. The crowd heard a yell and immediately following, the man went flying through the air several meters into the distance. When everyone was able to see clearly, they realized that Ban Hou used Separate Heel Kick to the man's groin area.
