Shibaev only played team matches (perhaps he was too tired after some European tournaments). Skachkov lost to Lakeev in QF (4-1). Alas, video of that match is not available - you can watch some of the moments herehttps://www.youtube.com/watch?v=8eLl0jQXivg
starting at about 2.50:00, they are playing at the table in the background. The front table (#2) shows other MS quarterfinals but since the camera is fixed you do not get to switch between tables; Skachkov-Lakeev were playing at table #1 and that match (as far as I know) was not videotaped (but I might be wrong)
I would not mind watching it -- I like Lakeev's style and technique very much. He is not very well known outside of Russia (he is a player of about WR #100-150 level but he doesn't get to go to international tournaments that often).