The young winger impressed in Hong Kong last week.
"I was delighted that he was on the scoresheet," said Larsson to the Sunderland Echo.
"He's a young lad whose come in and he's enthusiastic and he's done well so far."
The Sunderland midfielder added: "I'm sure it's been nice for him to have a fellow Swede around and ask a few questions.
"I like it myself too. I haven't played with a Swede before in club football so it's good."