Perez has always held a reputation as a hot talent at Newcastle-an import from Tenerifewho has frequently shown flashes of brilliance.
The second half was a much tighter affair but it was the Magpies who got the victor in the 68th minute when Matt Ricthie calmly slotted home from close range to seal all three points for Rafael Benítez's men.
"The training session and every game, sometimes you are lucky or unlucky but in the end I think they deserve to stay in the Premier League".
Arsenal boss Arsene Wenger says the Premier League's decision not to implement VAR next season is a "very, very bad decision" that could cost them a generation of fans.
Pierre-Emerick Aubameyang and Alexandre Lacazette, playing for the first time together, had linked up for Arsenal's opener in the 14th minute.
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Calum Chambers could have restored Arsenal's lead before the interval, but the defender shot wide from Mustafi's knock down.
At the start of the second half, the Gunners continued their total dominance in the game with their passing but could not break down Newcastle United who remained resolute in defending.
74' - CROSSBAR! Lovely and effective link-up play from Slimani and Kenedy allows the latter through on goal and his shot is deflected onto the frame of goal by Mustafi.
That really was the last big chance of the game as the Magpies made a decision to sit back and defend the lead that Ricthie gave them and they did it quite easily as the Gunners lacked ideas up front in the final few minutes on how they could break the hosts down.
After 10 consecutive defeats to the Gunners, Newcastle clinched their first home win over the north Londoners in some 13 years, sealing Arsenal's demise in dramatic fashion.