Portugal had faced a lot of criticism for their lacklustre display and inability to hold possession in their 1-0 win against Morocco but they appeared determined to set that right against the Asian powerhouse.
Saransk police said they received their first calls about the noise about 11 p.m. Sunday, when a first wave of Iran fans arrived and started singing outside the hotel.
Iran fan and IT consultant Mehdi Fayez arrived Monday morning after reading messages from supporters saying they needed to trouble Portugal to stand a better chance of winning the match.
Cavani, who also had scored in 2010 and 2014, netted the third goal in Uruguay's 3-0 win against Russian Federation.
"Obviously we can improve and there are things we definitely need to work on".
Fernando Hierro's side topped Group B ahead of Portugal on goals scored (David Josek/AP).More news: Pressure got to us against Switzerland: Brazil coach
Iran's Portuguese coach Queiroz said at his post-match press conference: "It was a football game that we honoured and we brought prestige to the World Cup".
Iran were awarded a penalty in stoppage time after Paraguayan referee Enrique Caceres used the video assistant referee (VAR) system to rule that Portugal's Cedric Soares had handled the ball in the box.
Isco became Spain's 47th different goal scorer at World Cups, when the Real Madrid player equalised against Morocco. "But now we need to be very demanding with ourselves and have clearly in mind that if we concede goals so easily, it will be very hard to reach our ultimate goal".
"I understand, it's normal", he said. Entering the final matchday, both teams are +1, so whichever team's margin of victory is higher would win Group B. If the goal differentials are identical, then it comes down to goals scored in group play-entering the final matchday, both teams are level.
Aspas said the players were initially confused as to where Monday's result had left them, given Portugal's simultaneous game against Iran in the same group, and the various permutations possible.
"The question I'd like to raise is on the second equaliser - we expect a corner on one side and it's played on the other".