Alexis is known for his passion and 'never say die' attitude - and Per Mertesacker says the Chile international "hates to calm down".
Currently away on holiday after competing in the Confederations Cup, Alexis is due to report back to London Colney later this month - but Per knows how the forward will be feeling.
"He was impressive again at the Confederations Cup," Per said. "He played a longer season than us so he’s now on holiday so he’s very quiet now with conversations and stuff. But one thing he is, is a warrior on the pitch.
"I think he likes to come back as quickly as possible from his holidays. He hates to calm down.
"So I’m really looking forward to playing alongside him in my last season and I think he makes us tick."
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