If you’ve ever scrolled TikTok or X during the spring and seen clips of pro LoL players from across the globe pulling off insane team fights or upsetting heavy favorite teams, you’ve probably seen content related to MSI. If you’re new to competitive League, you might be asking what is MSI League of Legends, and why it gets so much hype from fans and players alike. It’s the second biggest competitive LoL event of the year, only trailing the World Championship in viewership and prize pool, and it’s packed with enough chaos and iconic moments to keep even casual fans engaged. We’re breaking down everything you need to know to follow the tournament, understand the stakes, and even pick up a few tips for your own ranked games along the way.
What is MSI League of Legends, and How Did It Start?
MSI stands for Mid-Season Invitational, an official annual international tournament run by Riot Games that first launched back in 2015. Before MSI existed, the only cross-region official LoL event was Worlds, held at the end of every competitive year, and third-party tournaments like IEM were the only way for regional teams to face off mid-year. Riot launched MSI to fill that gap, giving the top team from every official regional league a chance to test their skills against the best in the world before the second half of the competitive season kicks off. I still remember watching the first ever MSI final in 2015, when China’s EDG beat Korea’s SK Telecom T1 in a five-game thriller, and it immediately felt like a core part of the LoL esports calendar that was missing for years.
The tournament is held in a different host region every year, with past hosts including the United States, France, South Korea, and Vietnam. Recent MSI events have had prize pools hovering around $2.5 million, with the winning team taking home roughly 40% of the total pool. Unlike Worlds, which sends 2-4 teams from major regions to compete, MSI traditionally only sends one team per region: the winner of that region’s spring split. That means every team competing has already earned their spot by dominating their home region, so the level of play is incredibly high from the very first match.
Some of the most iconic moments in LoL esports history have happened at MSI, from Caps’ 2019 Akali pentakill against Team Liquid to Faker’s 2023 Azir game-winning ultimate that secured T1 their first MSI title after years of near misses. It’s also the only event where you’ll see teams from smaller, less covered regions go head to head with the biggest names in the sport, which creates far more upset opportunities than you’ll see at Worlds.
How the MSI Tournament Structure Works
Riot tweaks the MSI format slightly every few years to keep things fresh, but the core structure has stayed largely consistent for the past two iterations. The tournament runs over roughly three weeks, with teams competing in three distinct stages to make it to the grand final. One of the biggest permanent changes Riot made a few years ago is tying MSI results to Worlds slots, which raised the stakes for every region even if their team doesn’t win the whole event.
The current official MSI format breaks down into three core stages:- Play-In Stage: Teams from emerging regions (including Japan’s LJL, Latin America’s LLA, and Brazil’s CBLOL) compete in a round-robin group stage first, with the top two teams from this stage earning spots in the main group stage. No major region teams participate in the play-in stage, so it’s a great chance to discover rising pro players from regions you don’t usually watch.
- Main Group Stage: The two qualified play-in teams join the spring champions from the four major regions (North America’s LCS, Europe’s LEC, Korea’s LCK, and China’s LPL) plus the champion from the PCS (Pacific Championship Series) for another round-robin stage. Every team plays each other twice, and the top four teams with the best records move on to the knockout stage.
- Knockout Stage: The top four teams from the group stage enter a single-elimination bracket, with every match played as a best-of-five series. The winning team of the final best-of-five is crowned the MSI champion, and earns both the trophy and extra benefits for their home region.
The biggest stake outside of the trophy and prize pool is the extra Worlds slot awarded to the region of the MSI winning team. That means if a LEC team wins MSI, Europe gets four spots at Worlds that year instead of the usual three, which gives more teams from that region a shot at the world title. Riot tested a format where the LCK and LPL got two MSI slots each in 2023, but switched back to one per region in 2024 to keep the original spirit of regional champions competing against each other.
Group stage matches are all best-of-one, which is part of why upsets are so common. A team that might be better on paper can have one bad game against an underdog and drop a crucial point, which keeps every match feeling high stakes even if it’s between a heavy favorite and a smaller region team. I’ve seen fans argue for years to switch group stages to best-of-three, but the best-of-one format is part of what makes MSI feel so chaotic and fun to watch.
Why MSI Matters for Casual Fans and Pro Players Alike
A lot of casual LoL players write off MSI as a “smaller Worlds” that isn’t worth watching, but that’s far from the truth. For pro players, MSI is the first chance they get all year to test their strategies against teams from other regions, who often have completely different playstyles and meta preferences than the teams they face in their home splits. Players who perform well at MSI often get offers from bigger teams across the globe, so it’s a huge career opportunity for players from smaller regions who don’t get much international exposure otherwise.
For casual fans who play ranked, MSI is one of the best ways to get a jump on the meta before it hits your solo queue lobbies. Pro teams test all sorts of off-meta picks and strategies at MSI to catch opposing teams off guard, and the picks that work usually trickle down to solo queue within a week of the tournament ending. MSI is often where meta-defining picks first show up on the global stage, so if you're someone who likes to climb ranked, watching MSI matches can give you a huge leg up on other players in your elo. A few years back, we saw enchanter supports like Lulu and Soraka dominate MSI after being nearly irrelevant in most regions for months, and within a week, half the support players in platinum elo were spamming those champions to climb.
MSI also has a way more laid-back vibe for fans than Worlds does. Since it’s not the final, make-or-break tournament of the year, you don’t have to stress as much if your favorite team loses, and there’s far less toxicity in fan spaces during the event. No other LoL event has the same mix of low pressure for fans (since it's not the final big tournament of the year) and high pressure for players, making the matches way more chaotic and fun to watch. I’ve had way more fun watching random MSI group stage matches with friends than I’ve had watching some Worlds finals, just because the energy is so much more lighthearted.
It’s also a great way to show off regional pride. If your region’s spring champion wins MSI, you get bragging rights over fans from other regions for the rest of the year, until Worlds rolls around. Even if your region’s team doesn’t win, seeing them take games off of top international teams is always a fun moment that gets talked about in regional fan spaces for months.
Tips for Getting the Most Out of Watching MSI
If you’ve never watched MSI before, it can feel overwhelming at first trying to keep track of 12+ teams from 10+ different regions, but it doesn’t have to be complicated. The first thing I recommend for new viewers is to pick one underdog team from an emerging region to root for, in addition to your home region’s team. It gives you a reason to care about matches that don’t involve your home team, and it’s always fun to root for a team that no one expects to do well. I picked the Vietnamese team GAM Esports as my underdog a few years back, and watching them beat a heavily favored LEC team in the group stage was one of my favorite LoL esports moments ever.
If you don’t understand why a team won or lost a match, don’t skip the post-match analyst breakdown. The broadcast analysts are all ex-pro players or coaches, and they break down macro decisions, team fight calls, and meta picks in simple terms that even new viewers can understand. You’ll pick up so much knowledge about how the game works at a high level just by watching 10 minutes of analysis after each match. If you're watching with friends, try predicting the outcome of each group stage match for a friendly bet, it makes even the lower stakes matches feel exciting. My friend group usually does a small bracket pool for MSI every year, with the loser buying pizza for the group during the grand final, and it makes the whole tournament way more engaging.
If you can’t watch matches live, do your best to avoid social media until you can watch the VOD. Most LoL esports communities require spoiler tags for 24 hours after a match ends, but it’s still easy to stumble on a clip or tweet that ruins the outcome before you watch. Most official LoL esports channels upload full VODs of every match within an hour of them ending, so you don’t have to wait long to catch up.
You also don’t have to watch every single match to have a good time. If you only have time to watch the knockout stage matches, that’s completely fine, and you’ll still get to see the highest level of play the tournament has to offer. MSI is supposed to be fun, so don’t stress if you miss a few group stage games.
Whether you’re a diehard competitive LoL fan who watches every regional split, or a casual player who only tunes in for big international events, MSI is one of the most fun esports events of the year. Now that you know what is MSI League of Legends, you can jump into the next tournament with all the context you need to follow along, pick your favorite teams, and even pick up a few new tricks for your own solo queue games. You don’t have to know every pro player or understand every macro call to have a good time: just grab some snacks, pull up the stream, and enjoy some of the best League of Legends play you’ll see all year.