Maracana SA made the decision to carry out the unscheduled facelift to capitalize on a fixturing quirk that has left the stadium without football for almost two weeks.
"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.
Marco Cecchinato of Italy labored to beat Britain's Kyle Edmund 3-6, 7-6 (7), 6-2 and is set to meet Serbia's Filip Krajinovic.
"We had more rest time than other teams. This will benefit us for the match against Al Shorta," Namjoo Motlagh was quoted as saying.
In the first stage competition held in Milton Keynes, England, 31-year-old Xiao won the group decider against Iran's Hossein Vafaei 3-0.
He also expressed his commitment to the club, commenting he would "give my heart on the field to my team-mates, the club and also to the fans."
The Arsenal captain scored a brace in last season's FA Cup final as Arsenal came from behind to beat Chelsea 2-1. He also netted in Arsenal's 3-0 victory over Fulham last Saturday in their first game of the new Premier League season.
Moises Caicedo put the hosts ahead with a 40th-minute strike at La Casa Blanca in Quito, more than 2,800m above sea level.
Feng Zhiqiang and Mo Jiadie came first in the men's and women's 400m hurdles. Xu Shuangshuang won women's 5,000m. In field events, Luo Na won women's hammer throw with 69.19m, while Wu Ruiting ranked first in the men's triple jump. Enditem
The following games conclude the first round on Sunday: RB Leipzig face Mainz, while Wolfsburg host Bayer Leverkusen. Enditem
"We are waiting for what the Ministry of Health and the president are going to say about sporting activity and give us direction and that is what we are going to do as to when football activity is starting and when there is a continuation of the league," he added.