He wasted valuable chances on goal, but the South Americans dug deep, and connected on a late free kick from Carlos Sanchez that found Gimenez perfectly.
Teachers and children with Uruguayan flags sprinted out of the confines of the classroom to race around the playground and scream in joy.
Egypt will train at Krestovsky Stadium on Monday evening ahead of Tuesday's match against Russian Federation, who opened the tournament with a 5-0 trashing of Saudi Arabia in Moscow.
With the game evenly poised, Cuper's decision to keep Mohamed Salah on the bench seemed to be a masterstroke saving him for the Russian Federation and Saudi Arabia games.
Uruguay defender Diego Godin, who plays in Spain for Atletico Madrid, did not take kindly to an "inopportune" question in a subsequent press conference asking if he meant to follow Ramos in giving Salah some roughhouse treatment.
Spain Fires Manager on Eve of World Cup
It's safe to say though, that this certainly is a bad look on the coach, who didn't appear to be transparent in his intentions. We only found out just five minutes before [the Real deal was made public] that he was leaving for Madrid .
On the other side, Trezeguet managed to get Egypt's first shot on target, although it was easily saved by Fernando Muslera.
As a result, there were fears he would miss Egypt's World Cup campaign. While Oblak in his own right, is up there with the best of the business, in front of him are two men who just seem to love the art of defending and the hardness that comes with it.
Where is FIFA World Cup 2018 Egypt vs Uruguay match?
Uruguay have won each of their last three World Cup group stage games with a goal scored in the last 10 minutes of matches.
"We're trying to make him feel confident - even the doctors are giving him the option to play or not, but I know Salah very well and I'm sure he's not afraid, he's not fearful", Cuper added. We either die or we kill and the experience today will help us grow, but we can't make too much of it. The match will be a delicious encounter as the two teams look to register their first win in the tournament for 3 points.
"I don't know what happened but I will not speculate".