Messi had sat out the previous two games suspended after being sent off in the Spanish Super Cup final defeat by Athletic Bilbao but looked refreshed and ultimately made the difference again.
The rejection from the global superstar is a public relations disaster for the Kingdom which is trying to find its feet as it diversifies its economy.
With majority of games being played without spectators since June, matchday revenue for top European clubs is likely to remain close to zero until the end of the 2020-21 season.
Messi will miss Barcelona’s match against third-division club Cornella in the Copa del Rey and against Elche in La Liga.
Meanwhile, Lionel Messi and Antoine Griezmann each scored twice as Barcelona thrashed Granada 4-0 away to win a third consecutive La Liga game for the first time this season.
British expatriates residing in Spain are unable to board flights to Barcelona and Madrid after airlines claimed their papers were no longer valid post-Brexit.
Mo Salah told Spanish newspaper AS in an interview this month that he admired Real Madrid and Barcelona, fuelling talk in the British media that he was looking to move on.
Messi headed in from Jordi Alba's cross after his first-half penalty was saved to equal the mark set by the Brazilian great Pele for Santos.
Sergio Conceicao's side were on the defensive for long periods at the Estadio do Dragao, but a series of superb saves from Porto keeper Agustin Marchesin secured the point they needed to advance.
Tuesday's action in the Champions League saw Erling Braut Haaland, Neymar, Cristiano Ronaldo and Bruno Fernandes all get among the goals.
Lockdown is defined as “the imposition of stringent restrictions on travel, social interaction, and access to public spaces,” according to Collins Dictionary.
Bartomeu's departure follows mounting pressure from fans and his public falling-out with Lionel Messi and helps avoiding a vote of no confidence, which had been triggered after over 20,000 Barcelona members signed a petition for him to be removed.
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