2019 Mid-Season Invitational

Tournament Format and Qualification

The 2019 MSI was the culmination of the 2019 Spring Split, the first part of season 9 of League of Legends esports. It featured 13 teams, one from each of the world's premier leagues, a decrease from 14 the previous year. This reduction was due to the merger of the Latin America North (LLN) and Latin America South (CLS) leagues into a single Latin American league (LLA). The tournament format was based on the structure used for the 2017 Mid-Season Invitational.

Qualification for the different stages was based on regional success in the two prior years of international competition, specifically the 2017 and 2018 MSI and World Championship events. As a result, the champions from Europe's LEC, South Korea's LCK, and China's LPL earned direct entry into the main Group Stage. The champions from North America's LCS and the LMS region, representing Taiwan, Hong Kong, and Macau, were seeded into the second round of the play-in stage. The eight remaining regional champions began the tournament in the first round of the play-in stage.

The Play-in Stage Structure

The play-in stage was held entirely in Ho Chi Minh City, Vietnam, at the VCS Studio. The eight teams starting in the first round were drawn into two groups. The group stage followed a double round robin format where each team played the others in its group twice. The first-place team from each group advanced to the second round.

In the second round, these two winners faced the teams from North America and the LMS region. The winners of these matches advanced directly to the main Group Stage. The losers of these second-round matches were not eliminated. Instead, they were dropped into a third and final qualifying round. The winner of this final round earned the last spot in the six-team main Group Stage.

Main Event Group Stage

The Group Stage moved to Hanoi, Vietnam, and was held at the Vietnam National Convention Center. Six teams competed, the three direct qualifiers from the LEC, LCK, and LPL, plus the three winners from the play-in stage. The format was a double round robin where every team played each other twice. The top four teams from this group advanced to the knockout playoffs, while the bottom two teams were eliminated.

A key strategic advantage was awarded to the team that finished first in the Group Stage. That team earned the right to choose its opponent for the semifinals, selecting between the third and fourth-place finishers. This choice was exercised by China's Invictus Gaming, who selected to face fourth-place Team Liquid.

Knockout Playoffs in Taipei

The knockout stage was a single-elimination bracket held in Taipei, Taiwan, at the Taipei Heping Basketball Gymnasium. All matches, including the semifinals and final, were played as best-of-five series. The semifinals featured a major upset as North America's Team Liquid defeated the tournament favorites and group stage leaders, Invictus Gaming from China.

In the other semifinal, Europe's G2 Esports defeated the South Korean squad SK Telecom T1. This set up a final between the two Western teams, G2 Esports and Team Liquid. The final was a decisive victory for Europe, with G2 winning 3–0 to claim the MSI trophy. This victory marked the first time a European team had won the Mid-Season Invitational.

Prize Distribution and Broader Impact

The total prize pool for the tournament was $1,000,000 USD. From this pool, the champion team, G2 Esports, claimed $400,000 for their victory. The tournament's official theme song was Bring Home The Glory, which was put together by Sara Skinner.

The event had significant consequences beyond the immediate competition. As the host region, Vietnam's VCS league received a direct spot in the main Group Stage for its Summer Split winner. It also earned an additional spot for a team in the Play-in Stage of the 2019 League of Legends World Championship later that year, rewarding the region for its role as host.