European Champions League (ECL) is the seasonal table tennis competition for the highest ranked European club teams and is regarded as the most important international club competition in Europe.

In the women's competition, TTC Berlin Eastside from Germany has won the league five times, making it the most successful club.

The Men's Champions League was first organised in the 1998/99 season, with the aim to replace the European Club Cup of Champions, the previous highest level European club competition held since 1960/61 season.

The maximum number of games had been reduced from seven to five, and the double had been cancelled, with the aim of having a better presentation on TV and more excitement for the spectators.

These changes were undertaken in the hopes of making table tennis more popular in a European level as well as motivating the coming generation.

For the men's league, the 16 teams are divided into four groups within which they play round robin matches.

Those eight teams would play in a single knock-out system, with quarter-finals, semi-finals and finals, to determine the winner of the competition.

If each team wins one leg, the result is determined by aggregate score first in individual matches, then in games and finally in points.

Reserve players being present in the hall would be considered as participants of the match, if confirmed on the result sheet by the referee.