Emery wasn't ready to say for certain whether the young forward, who models his game on Cristiano Ronaldo, will be a part of his first-team plans this season.
It was Bukayo Saka who opened scoring for the Gunners just after 13 minutes of action after chipping the ball over Clint Irwin from a close range effort.
Arsenal are eyeing Gremio attacker Everton Soares as a more financially viable option as they lose hope of signing Crystal Palace's Wilfried Zaha this summer, according to a 10:00am Sky Sports report.
Unsurprisingly bet365 make Arsenal 4/9 (1.44) favourites to win this friendly match, whilst the draw is available at 7/2 (4.50).
Emery selected a young team to start the match and he was pleased with the performance.
Arsenal, too, started a reserve team as they begin their build up to the Premier League season after again failing to secure a Champions League berth.
At the end of the day, exemplary behaviour is expected of Koscielny being the club's captain, and to refuse to travel seems a shocking show of disrespect.
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After all, he managed what even the great Ian Botham failed to achieve in Australia in 1992. The three pacers in Tendulkar's World Cup XI are Mitchell Starc, Jofra Archer and Bumrah.
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Addressing the incident after the game, Emery said: "I spoke with him three times for his situation".
The 33-year-old French centre back, who has a year left on his contract, has been linked by the British media with a switch to Ligue 1 clubs Girondins Bordeaux and Olympique Lyonnais.
"I'm sure the player realises that if someone's going to take him away from us, he'll expect clubs to pay the market value".
Arsenal do not have the funds to get their hands on the player, despite his willingness to join the Gunners. They need to speak and are speaking about his situation ... I can not say more than that. He's speaking only with the club.
"I don't think Arsenal have actually made a bid that has come anywhere near our valuation", Hodgson told reporters.
Also see: Prominent Arsenal fans take aim at Stan Kroenke & demand change.