Although Madrid did substitute that league game with a friendly against Getafe, which they won 6-0, that remains their only match ahead of the new season, making it hard to draw conclusions over the match fitness of Zidane's men.
"I believe in Arsenal. We can achieve big things together. We have something exciting here and I believe the best is yet to come," he added.
He added that although the veteran striker is currently training separately from the rest of the players, "if in the end he is unable to find another team, he will be another member in the squad here."
Reguilon broke into the Real Madrid first team in the 2018-19 season, making 22 appearances and moving ahead of the Brazilian left back Marcelo in the pecking order.
Maracana SA chief executive Severiano Braga said one section of the pitch had already been replaced with positive results.
While professional football depends to a much lower extent on ticket sales, other sports view the decision only as a first step. Ice-hockey, handball and basketball require bigger crowds to cover their costs.
The 22-year-old Ge set a new personal best of 22.69s this May, aiming to qualify for the postponed Tokyo Olympics final. "I was too hasty to concentrate, when I heard some noise I thought it was the gun," she said.
Koeman had expressed an interest in signing Dutch international Memphis Depay from French side Lyon, but in a TV interview on late on Tuesday, he explained that Barca's economic situation was complicating the deal.
Stage One involves 32 groups of four players, with the player who tops each group progressing to Stage Two.
The deadlock was finally broken with eight minutes to go, when a corner was nodded onto the path of defender Khalilzadeh, who was well-positioned at the far post to control and finish into the bottom corner.
Depending on local rules and arena capacity, the number of fans will differ.