Afterwards, the 25-year-old admitted it was a relief to get off the mark and believes there will be many more goals to come.
"This goal has taken the pressure off me. It's done, I have my first goal. But it has to be the start of a beautiful adventure," he told arsenal.com.
"Even unconsciously I was thinking about this first goal. I tried not to think about it but my family, friends and a lot of people were talking to me about it.
"For a striker, it's always good to find the net again. I have an assist already this season but it's not like a goal. For a striker, it's important for the confidence. I hope many more will follow.
"I want to play week in, week out, find my rhythm and keep scoring. I am convinced that with some perseverance, it will come."