Although he scored from the penalty spot, Egypt were beaten 3-1 to leave them on the brink of elimination.
Cuper during the post-match conference said luck was against his team as they got punished for the "few minutes" they made. For me there's no shadow of a doubt there.
Two minutes into the second half, Russian Federation got the breakthrough thanks to an own goal by Ahmed Fathy, who was unfortunate to see a low shot come off his knee and sail into his own net. It flew off his leg as he slid to intercept it.
"I don't think it was a lack of concentration".
It was Cheryshev's third goal of the World Cup, putting him tied with Cristiano Ronaldo at the top of the scoring chart. Russian Federation will have also taken huge confidence from that emphatic victory last time out and that should work in their favour here against an Egypt side under pressure to come out and play, as opposed to their usual defensively disciplined tactics.
He was an unused substitute in Egypt's first Group A game - a 1-0 loss to Uruguay last week.
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After a tight first half Russia's breakthrough came just two minutes after the restart.
For much of the 90 minutes at the St. Petersburg Stadium, the 26-year-old Egyptian tried to find space for himself, with his teammates unable or incapable to provide him with the kind of service he receives at Liverpool. "We held back Salah and deserved to win", he said. "But that's how matches work".
"Would I prefer to see Salah play or not?" Egyptian fans nearly outnumbered Russian supporters at the stadium, showing that they have taken the trouble to express their love for Salah as much as for the game. The shoulder injury that kept him out of Egypt's loss to Uruguay may not have been fully healed. "But we know the quality he has". "We weren't decisive enough".
"The national squad is above any individual, including myself", Cuper said. He plays as a team player and that for me is extremely important nowadays.
"We need to bear in mind that there is not only one player on the pitch".