Ronaldo had previously struggled at the World Cup but the five-time Ballon d'Or victor has flown out of the blocks in the 2018 edition so far.
"He's very happy to be here with us and every match it's a privilege for us Portuguese to have a player such as him".
Spain began the World Cup in disarray after the federation fired coach Julen Lopetegui just 48 hours before its opening match against Portugal.
Morocco might be without Nordin Amrabat, who suffered a concussion in Friday's 1-0 loss to Iran.
A Selecao head into the Group B clash having hit the back of the net at least twice in nine of their past 10 World Cup games (including qualifiers), while they are also unbeaten in those 10 matches.
Spain´s midfielder Andres Iniesta (L) and coach Fernando Hierro attend a press conference in Kazan on June 19, 2018 ahead of their Russian Federation 2018 World Cup Group B football match against Iran.
Ronaldo has struck 23 times in his past 18 matches for his country, with 15 of those goals coming in World Cup qualification.
The Morocco defender Nabil Dirar added: "Tomorrow will be a final for us, an important battle".More news: McDonald's to ditch the plastic straw in favour of paper alternative
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Iran have never beaten a European side at a World Cup - their only previous victory was a 2-1 win over the United States in France in 1998.
However, Herve Renard's side are more than capable of springing a surprise, as they boast of the strongest squads of the five African representatives in Russian Federation this month.
Also, this year 32 teams are taking part in the tournament and they are divided into 8 Groups for 4 teams each.
The FIFA World Cup 2018 Match-18 between Portugal vs Morocco is going to be played at the Luzhniki Stadium, Moscow.
The aircraft landed safely after what one of the Saudi players called a "simple malfunction".
Aside from rubbing salt in the wounds of their Iberian rivals following the sacking of Spain coach Julen Lopetegui, Ronaldo's late equaliser puts Portugal in a strong position to qualify for the knockout stage if they beat Morocco, in just the second meeting between the two nations.
"Look at all the surprises: Mexico, Iceland, Senegal, Japan".