Yury Gazinsky scored tournament's opening goal with a firmly-placed header to give hosts 1-0 lead in the 12th minute of the match.
Substitute Denis Cheryshev, who replaced the injured Alan Dzagoev, scored the second goal for the hosts in the 43rd minute to double their lead.
Another substitute scored for Russia, a clinical header from Artem Dzyuba, took the hosts to a 3-0 lead against Saudi Arabia in the 71st minute of the match.
Cheryshev added another fine goal for the Russians, taking them to a 4-0 lead in the injury time.
Fans from all over the world witnessed a glitzy and glamorous affair at the opening event of the much awaited FIFA World Cup 2018.
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