Santi Cazorla roars with delight after opening the scoring for Arsenal as they defeated WatfordThe Gunners midfielder gave the visitors the lead from the penalty sport after nine minutes at Vicarage RoadThe 31-year-old watches on as his spot-kick beats Watford goalkeeper Heurelho GomesCazorla was quickly congratulated by his team-mates as they went in search for their first Premier League win of the seasonArsenal were awarded the penalty after forward Alexis Sanchez was clattered into by Nordin Amrabat (top)Watford were furious with referee Kevin Friend as Sanchez laid stricken on the floorSanchez had to be seen by a member of Arsenal's medical team but was quickly back on his feetOn 40 minutes Sanchez doubled Arsenal's lead with this bouncing left-footed effortThe Chile international watches on as his effort bounces into the ground before heading towards the netGomes and his Watford team-mates try in vain to clear the ball - but it had already crossed the lineSanchez (right) was congratulated by his team-mates as they took a 2-0 lead on Saturday afternoonAnd just minutes later, Arsenal's advantage had got even bigger thanks to Mesut Ozil's strikeThe Germany international got in front of Jose Holebas to powerfully head home the Gunners' thirdArsenal's No 11 celebrates his first strike of the Premier League season with his team-matesWatford pulled one back on 56 minutes through summer signing Roberto PereyraThe 25-year-old gave the hosts hope with this left-footed strike inside the penalty areaPereyra clenches his fist in celebration as he bids to spark a comeback for his side against the GunnersWatford team-mates congratulate Pereyra for scoring 11 minutes after the intervalArsenal were dealt a blow when left back Nacho Monreal was forced off late on in the second halfMonreal's disappointment was clear to see as he hobbled off the pitch during the Premier League encounter
