Muay Thai is a martial art originating from Thailand that is used to fight with fists and feet. The sport has gained international popularity in recent years, thanks in part to the UFC and other professional organizations. Here are the top 10 muay thai fighters in the world as of 2019: 

1) Saenchai Muay Thai: The legendary fighter was born in 1955 and is considered one of the greatest muay thai fighters ever. He has competed in more than 100 fights, winning almost 60% of them. Saenchai is known for his speed, agility, and ring generalship.

2) Phetty Phummanee: The fighter from Thailand has an impressive record of 73 wins and 9 losses.

There is no doubt that the sport of muay thai is one of the most physically demanding sports in the world. With fighters from all over taking part in tournaments and fights, it can be hard to determine who is truly the best. However, after assessing data from various organizations and compiling a list of the top 10 muay thai fighters in the world, it is clear that these athletes are elite competitors. 

1. Nong Rungroj Jitmuangnon (Thailand) 
2. Saenchai Sor Kingstar ( Thailand) 
3. Phetjee Jaa (Thailand) 
4. Yodkhunpon Fairtex ( Thailand) 
5. Petchdamrong Kiatmoo9 ( Thailand) 
6. Chatchai Sasakul ( Thailand )