100 Thieves secured its 10th win of the 2021 League of Legends Championship Series Spring Split against Immortals, and in doing so, punched its ticket to the LCS Mid-Season Showdown. As a result of 100's win over IMT, TSM also mathematically qualified for the post-season.
TSM came into week 6 of the Spring Split tied for 2nd with Dignitas at 10-5, and an 11th win was all it needed to punch its ticket to the LCS Mid-Season Showdown, but it was unable to acquire it against Evil Geniuses. Fortunately for TSM, IMT's loss to 100 was its 9th of the season. With Immortals' best possible record to end the split being 9-9, TSM will and 100 Thieves are guaranteed spots in the Mid-Season Showdown with 10 wins apiece.
With Cloud9 and Dignitas having qualified for the post-season last week, only two spots remain in the 2021 LCS Mid-Season Showdown. Team Liquid, Evil Geniuses, and Immortals will fight for the remaining two seeds over the weekend. C9, DIG, 100 and TSM are all locked in for the post-season, but no specific seeds have been locked in yet. With C9's loss against CLG to open week 6 of the Spring Split, either a half game or a full game is all that is between the top 4 spots in the standings.
However, IMT's road to the Mid-Season Showdown just became much tougher with this loss. The only scenario IMT can hope for is to win its last two matches against TSM and C9, while one of Evil Geniuses or Team Liquid loses their last two matches.
If one of TL and IMT finish 9-9, Immortals would automatically secure the 6th seed in the Mid-Season Showdown because of its 2-0 head-to-head record against EG in the LCS Spring Split. If TL was to tie at 9-9 with IMT instead, the split head-to-head between the two teams would force a tiebreaker for a 6th place finish in the Spring Split, and with it, the final post-season seed.