Cech saved his first penalty for Arsenal when he stopped Troy Deeney's kick in the second half - sweet revenge for Arsenal following the striker's taunts that the Gunners had lacked "cojones" in defeat at Vicarage Road in October.
Mkhitaryan sealed Arsenal's victory, their first league win since beating Everton 5-1 on February 3, with a shot from inside the penalty area following Aubameyang's pass.
After the victory, Arsenal is in sixth place with 48 points, while Watford sits on 10th with 36 points.
Arsenal win their second-consecutive match after losing four straight in all competitions as Arsene Wenger stops his side's late season slide.
The Hornets' best chance of the game fell to captain Deeney after Pereyra had been fouled in the penalty area by a combination of Ainsley Maitland-Niles and Alex Iwobi. "How much I don't know, but it plays a part".
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Let them do whatever they want! She said: "I think I would like to see Michael Jordan's first game with the Chicago Bulls". Winfrey revealed she wanted the bookcase to look like the treehouse Kaling's character Mrs.
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'When I was in Dortmund, I was playing every three days but now I play once a week or have a long time between games.
"The record is absolutely remarkable", said the Frenchman, who reached 700 wins as Arsenal boss.
"It's been a while and I have to say it's never happened that I've had to wait 11 games for a clean sheet", the lanky goalkeeper told the club's website. "Fantastic motivation, fantastic desire and remarkable intelligence", he said.
Vieira, who played for Arsenal between 1996 and 2005, has prior coaching experience with Major League Soccer side New York City but didn't want to discuss replacing Wenger. But overall the spirit and desire was good. That kept us out of trouble. "We'll try to do our best in this end of the season and of course [hope fans] come to the stadium".
The Gunners managed to alleivate some of the growing pressure on the French head coach with a 2-0 win over AC Milan in the Europa League on Thursday night. They face Stoke on April 1st, in their first game back after the worldwide break.