Walcott scored twice in the first quarter and when Rob Holding made it 3-0 on 25 minutes it was effectively game over. However, they were unable to convert the confidence into goals, as Arsenal comfortably saw out the game at 4-2. However, he did still find it tough to stop Arsenal's intricate play like Hayduchk and Milunovic.
Arsenal have a squad built to compete on two fronts, as long as one of those two fronts is not the Champions League.
Scherbitiski made amends on one particular occasion to tip away another Walcott effort away at full-stretch to temporarily deny his hat-trick.
Rob Holding almost had his second goal for Arsenal from another corner but he swung at the ball and smashed his shot off the post. Poor finishing and couple of good saves from David Ospina ensured the score remained unchanged at the final whistle.
As reported by goal, Wenger said: "He had an outstanding first half".
But Walcott opted against taking the spot kick, allowing Giroud to step up for what was his 100th goal for the North Londoners. The France worldwide became the 19 player to score 100 goals for the Gunners.
They were already 2-0 up by then with their second goal on the stroke of halftime from forward Allan Saint-Maximin, who picked off a stray pass in his own half and burst downfield to score.
It's likely to be Arsenal's easiest path into the Champions League and the Gunners can not afford to miss out on £50 million where economic benefits are concerned.
"I'm not looking too far ahead". "I felt good coming back to Arsenal and into training and (Arsene Wenger) has been good".
To see Willock and Nelson take their fledgling steps makes it enjoyable to watch and when they're bolstered by the kind of experience that can make the vital contributions - like Giroud's 100th Arsenal goal - it's hard not to feel somewhat reinvigorated watching the games.
Arsene Wenger's side beat Cologne 3-1 at home in their first outing a fortnight ago, and the Germans lost again on Thursday, going down 1-0 at home to Red Star Belgrade.
Everton are now bottom of group E, three points behind leaders Atalanta, who drew 1-1 against Lyon.
Walcott added that it was a slight concern to see Wenger's charges take their foot off the gas after the hour mark, but admitted it was a good performance overall.