 The fourth round was marked by the encounter between the six-time Olympic champions Russia and two-time Olympic champions Ukraine on the first table.Russia approached the match without Sergey Karjakin, who played for Ukraine in three Olympiads in the past and won a gold medal with the team in 2006, while Ukraine did not have Yuriy Kryvoruchko in the line-up.The match started well for the Russians as Ian Nepomniachtchi succeeded to convert his slight edge into a winning position against Anton Korobov by spotting a mating net around the opponent's king to win his game with the Black pieces.