Gimenez rose perfectly to meet a Carlos Sanchez free kick and score the goal that broke a 48-year Uruguayan curse of failing to win their opening game at World Cup finals.
Jose Jimenez's 90th minute header gave Uruguay a crucial win over Egypt who posted a decent display in the encounter.
Uruguay stars Luis Suarez and Edinson Cavani wasted their chances.
Salah won the English Premier League Golden Boot Award after scoring 34 goals last season and capped a glorious season at Liverpool with Player of the Season award. But he said he was expecting his star striker to be on the field.
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The former Chelsea and Roma player was embroiled in a dispute with the Egyptian FA Salah over his image which featured prominently on the outside of the Egypt national team's plane provided by sponsors WE.
"He did not play today because we wanted to avoid risk or danger but I think that he will be fine for the next match", said the coach.
The north Africans, contesting their first World Cup since 1990, were for the main part fairly comfortable in defence and Arsenal's Mohamed Elneny was a constant presence at the base of Egypt's midfield.
"For three years and a few months we've decided on a certain path..."
Egypt fans will be hoping to see Salah in their second match of the tournament, against hosts Russian Federation on Tuesday, 19 June.
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"So we decided not to take that risk because we want to be sure we have him in top form in our match against Russian Federation and Saudi Arabia".
The script seemed set for Mohamed Salah to make the World Cup debut of a lifetime.
Cuper also entertained a question from a reporter about Salah's prospects of emerging as the top scorer at the tournament.
"That is a very inopportune question", Godin responded, evidently irritated by the implication that Uruguay might attempt to inflict the sort of injury on Egypt's talisman that had materialised from the Ramos clash.
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He's also threatened to tear up the NAFTA agreement with Canada and Mexico. He said he did not blame the G7 leaders for the "unfair" trade deals.