Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Aleksandr Kletskov (Russian: ; born 27 September 1985) is an Uzbekistani international football defender. Kletskov began his playing career with Pakhtakor and has appeared for the club in several editions of the AFC Champions League. He also has played for Jiangsu Sainty and Tianjin Teda in the Chinese Super League. Association football, commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball. At the turn of the 21st century, the game was played by over 250 million players in over 200 countries, making it the world's most popular sport.