Cavani, 31, proved how vital he is to Uruguay with his double against the Portuguese, and France will be buoyed if he is indeed sidelined.
The winners from today's matches will face each other in the quarter-finals in Sochi next weekend.
To be fair, Portugal had four impressive performances in Russian Federation, including the one against Uruguay at the Fisht Stadium.
Uruguay's Luis Suarez celebrating his goal against Russian Federation.
"Cavani is well", Uruguay midfielder Rodrigo Bentancur said in Monday's news conference.
European champions Portugal came up against a superior version of themselves as they were knocked out of the World Cup by Uruguay on Saturday (June 30).
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I think people would be anxious about coming out because of the trouble, but from what I've seen, there won't be any trouble. Do we wish to repeat what happened to Andres Escobar? "We have shown against Colombia that we are hungry, we are fearless".
Uruguay responded within minutes when Cavani curled home after Portugal were pressed into surrendering possession deep in their own half.
"This is football. Whoever scores more goals wins", Ronaldo said.
In previous editions, Uruguay relied on meanness and defence, with Suarez being the spearhead in front.
The only blemish for Tabarez's side was the injury to Cavani which saw him substituted by Christian Stuani. They have had a chance to top Group B while leading in the third round of group match against Iran in the first half, but the game ended in a draw ultimately after a controversial penalty goal from the opponent. We have a team of players who are ambitious.
Paris Saint Germain striker Mbappe illuminated the match with his electric turn of pace and sharp dribbling. "On a post by Antonella captioned "#VamosPapi", which means "Go Daddy", people commented saying "Papi is a loser" and "I hope you will tell Messi to play a better match against Nigeria". "You have a coach who has been working with them for 12 years, very experienced, very high-quality", he said, adding that they have yet to concede a goal in 2018. They have two exceptional strikers, Griezmann and Mbappe - they're very fast indeed.
A slow start and an 89th minute victor that gave them a forgettable 1-0 win over a Mohamed Salah-less Egypt in their first game, has now given way to a campaign with real hope of winning the World Cup. We saw some really strong performances from Mexico, Colombia and the hosts of Russian Federation. but who will win? "We know it's a special game for us, I don't know for him".