The 23-year-old forward, who recently penned a new long-term deal with the Gunners, was on the receiving end on some physical challenges during the win over the Potters.
And Wenger believes the England international has learnt to stand up to physical play better over the last few months as he continues his development.
“He is 23 years old and there is always a change at that age,” said the Arsenal boss. “What people forget is that Theo does everything at 100mph, so every time you get hit it hurts you more than if you are slow.
“He plays at high pace, but he has learnt to escape sometimes and he imposes himself more. He uses his body better now.”
Wenger also praised his side’s ability to grind out a battling win against Tony Pulis’ men to keep their push for a top-four finish alive.
He added: “In England you have to deal with all types of football without losing your qualities in how you want to play.
“It is not always easy, because if you have a team of 10 Santi Cazorla’s technically you would be very good but against a team like Stoke you would struggle.”
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