Less than a minute remaining in the first half, it was Cheryshev to up the score, shooting the ball into the upper left of the Saudi Arabian net to leave 2-0 displayed on the stadium's huge digital screens as both teams retreated for the 15-minute break.
"I could never have dreamed of anything like this".
He added: "Peace is what we are most interested in".
Located in Moscow, the Luzhniki Stadium can hold over 81,000 people.
Job done and then some as far as a World Cup host can be concerned, and Egypt and Uruguay have a tough act to follow when they resume the Group A action against one another on Friday.
Those fears were soon washed away, at least for the time being, as Alexander Samedov and Fedor Smolov carved out early chances only to be denied by desperate sliding blocks.
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While the mood is dark in the Saudi Arabia camp, it could not be brighter for the hosts.
Hero Introduced after just 24 minutes from the bench, Russian striker Denis Cheryshev scored two outstanding goals.
Russian Federation coach Stanislav Cherchesov has come under fire from the local media for his failure to find a winning formula, yet there must be a real danger the hosts will crash out in the first round.
Thousands of Russian and foreign fans had turned out to watch the World Cup opener in a Moscow fan zone.
But Russia's win was all but sealed in the 71st minute with Golovin again the creator, the CSKA Moscow midfielder producing a lovely centre from the right that allowed Dzyuba to nod in within two minutes of his introduction.
The forward was soon replaced by Dzyuba, who struck nearly immediately by heading another Golovin cross beyond a helpless Muaiouf in the 71st minute.
Dzagoev's replacement, Cheryshev, certainly stepped into the breach by scoring two goals after replacing the CSKA Moscow midfielder, including a stunner to make it 4-0, but the hosts can not afford to have their resources depleted even further by the loss of one of their best players.