make the games more attractive to the audience. Nevertheless, a few basic rules and restrictions will probably remain unchanged in the following years. Teams who participate must provide local media coverage and live TV broadcasting. The competition is divided in at least two phases: a preliminary round (usually called "Intercontinental Round"), with a system of rotating host cities; and one or more final rounds, with one or more host nations. In the preliminary round, teams are organized in pools. Each team plays a total of four matches against all other teams in its pool, two at home, two as visitors. Each pair of matches is played over a weekend. When all the matches of the preliminary round have been played, the top n teams in each pool qualify for the final round(s), and the remaining ones leave the competition. The value of n depends on the number of participating teams and the format that will be employed in the finals. Host nation(s) automatically qualify for the final round(s). The FIVB has tried various formats for the final round(s): Top Six, Top Four, Quarter-Semi-finals (Olympic format). For some years now (2004), the most commonly used is a mixed format: quarterfinalists are organized in two pools, and the top two teams in each pool play semifinals and finals according to the Olympic format. In the preliminary round, a team is usually given the right to work with a list of nineteen players, from which the coach builds the fourteen-player line-up included two liberos (if the team include only one libero in the roster, their max roster number is limited to 12) that will be employed in a particular weekend. For the final round(s), only fourteen players included two liberos are allowed. Hosts List of hosts by number of final round championships hosted. Appearance Brazil and Italy are the only teams that participated in all editions of the World League. Results summary Medals summary MVP by edition 1990 – 1991 – 1992 – 1993 – 1994 – 1995 – 1996 – 1997 – 1998 – 1999 – 2000 – 2001 – 2002 – 2003 – 2004 – 2005 – 2006 – 2007 – 2008 – 2009 – 2010 – 2011 – 2012 – 2013 – 2014 – 2015 – 2016 – 2017 – Gallery See also FIVB Volleyball Men's Nations League FIVB Volleyball Men's World Championship FIVB Volleyball Men's World Cup FIVB Volleyball