Rugby union is a very popular sport especially in European countries. It is a kind of competitive outdoor contact sport. Two teams with 15 players for each team play this sport with an oval ball. The rugby union is one of the main codes of rugby football. The other is rugby league. The rugby union also has rugby sevens, a seven-a-side variant usually played under specific laws and it is also played by two teams with only seven players. Some people may not know about rugby union because it is more popularly known as rugby and rugger although the latter has already declined.
The rugby union matches last for 80 minutes with a few minutes for the stoppage time. There is also a short interval which should not last more than 10 minutes given after the first 40 minutes of the match and usually under 19 levels or lesser. However, there are some games that are limited to only 70 minutes with an interval of 35 minutes.
The rugby union matches are usually controlled by a referee. The referee is usually by two other men called assistant referee or touch judges. However, for professional rugby union matches, the controller of the match is called TMO or Television Match Official or video referee. The TMO or video referee gives advices to the match referee in terms of dropped goals or scoring of tries.