Obi scored seven goals in yesterday's 9-0 win against Norwich City.
That's 28 goals this season for Obi and Wilshere told arsenal.com: "Of course, it helps when you have a goalscorer like Chido who is on fire at the moment, and everything he touches seems to go in."
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The coach added, "He's worked so hard over the last couple of years, especially since we've had him at Sobha Realty Training Centre over the last six weeks, and he's getting his rewards for that hard work.
"But, we've also got to give massive credit to the team for supplying him."