PSG.LGD and OG continued their run through the upper bracket of the International 9 on Thursday and will meet for a berth in the grand final.
PSG.LGD swept Vici Gaming, and OG knocked Evil Geniuses into the lower bracket with a 2-1 win in the best-of-three series in Shanghai, China.
In lower-bracket action, Infamous eliminated Newbee and Team Secret ousted Mineski, both teams taking 2-1 wins.
On Friday, the Day 4 competition in the lower bracket pits Royal Never Give Up against Team Liquid, while Infamous will battle Team Secret.
Evil Geniuses then will meet the winner of the RNG vs. Liquid clash.
The teams are vying for a record prize pool of more than $33 million, with the winning team to take home more than $15 million.
Thursday's eliminated teams -- Newbee and Mineski -- each earned $676,581.
--Field Level Media