The former Racing Club playmaker also revealed the reason for his move to La Liga.
The Portuguese spent three seasons with Wolves, and was the team's top scorer with 17 goals when they secured promotion to the Premier League by winning the Championship in the 2017/18 season.
"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.
"I'm always proud to wear my colors. Thank you, Pumas, for trusting me and being my support," Talavera, who has been capped 28 times, said in a Twitter post.
Athletico capitalized on the numerical advantage when Walter, unmarked inside the 18-yard box, struck his first goal of the campaign.
Elsewhere, Estudiantes beat Alianza Lima 3-2 and Caracas won 3-2 at Independiente Medellin. Enditem
The club has splashed cash on 12 new players in the current transfer window including foreigners; Uganda international Tito Okello, Cameroonian midfielder Bertrand Ngafei and Malawian midfielder Andrew Malisero.
Gong Kewei of Hubei competes during the javelin throw of Decathlon on Day 2 of the 2020 Chinese National Athletics Championships in Shaoxing, east China's Zhejiang Province, Sept. 16, 2020. (Xinhua/Jia Yuchen)
ASUNCION, Sept. 15 (Xinhua) -- The South American 2022 World Cup qualifiers will begin next month despite concerns about the coronavirus pandemic, the region's football governing body CONMEBOL said on Tuesday.
Yet again, Slovan were close to sealing the victory after the home team's striker Ilmari Niskanen missed his attempt in the third round of the penalty shots but Slovan's Ratao and Nono failed to capitalize, sealing a 4-3 shootout victory for the Finns.
The English, Spanish and German press on Thursday all reported that Liverpool have agreed to a fee of around 30 million euros for Bayern Munich's Spanish international midfielder Thiago Alcantara.