Here is a concise summary of the text:
**Event:** 1988 "Clash of Kickboxing and Thai Boxing" fight
**Fighters:**
* Ric Rufus (USA), undefeated kickboxer (28-0)
* Chang Puay (Thailand), Muay Thai fighter
**Fight Highlights:**
* Rufus dominated early, but Chang's persistent low kicks weakened Rufus's leg
* Chang knocked down Rufus multiple times, ultimately winning the fight
* Rufus suffered a serious leg injury, requiring medical attention after the fight
**Aftermath:**
* The fight popularized Muay Thai worldwide, showcasing its effectiveness
* Rufus's brother, Duke, initially downplayed Chang's skills but later adopted Muay Thai elements into his training, becoming a renowned Muay Thai trainer.
Here are the key facts extracted from the text, numbered and in short sentences:
**Event Background**
1. In the 1980s, Muay Thai was a relatively unknown martial art outside of Thailand.
2. A significant martial arts event occurred in 1988, pitting kickboxing against Muay Thai.
**Fight Details**
3. The event featured Ric Rufus, an unbeaten American kickboxer (28-0), against Chang Puay, a Thai Muay Thai fighter.
4. The fight was governed by American kickboxing rules, which prohibited elbows, throws, grabs, clinches, and blows below the waist.
5. Low kicks, however, were allowed.
6. The fight, dubbed "The Clash of Kickboxing and Thai Boxing," was televised worldwide.
**Fight Progression**
7. The first round saw Rufus start aggressively but Chang Puay landed significant low kicks.
8. Rufus suffered two knockdowns in the first round but survived to the second round.
9. In the second round, Chang Puay's low kicks continued to trouble Rufus, who struggled to evade them.
10. By the third round, it was clear Chang Puay had the opportunity to win, continuing to strike Rufus with effective blows.
11. In the fourth round, Rufus avoided his opponent due to severe leg pain from the low kicks.
**Aftermath**
12. After the fight, medical assistance was required for Rufus due to a serious leg injury.
13. Chang Puay's victory greatly popularized Muay Thai worldwide, boosting its development.
14. Duke Rufus, Ric's brother, later incorporated Muay Thai elements into his arsenal and became a renowned Muay Thai trainer.