The 24-year-old is one of the most prolific forwards in the women's game and her classic number 23 shirt is quickly becoming iconic.
Russo wore the jersey number during her time at Old Trafford and will continue to wear it for England during the Women's World Cup.
And now she has taken the vacant 23 at Arsenal as well with the inspiration for coming from an all-time great sportsperson.
Why does Alessia Russo wear number 23?
The whole idea of wearing the number 23 for club and country comes from Michael Jordan.
The basketball legend made the number 23 an iconic number, most notably during the six NBA championships he won with the Chicago Bulls.
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MJ is one of sports greatest champions, winning a huge array of individual and team awards, so it's no wonder Russo is inspired by him.
Speaking to talkSPORT last year, she said: "I'm a massive Michael Jordan fan, and that's why I wear number 23. I actually met him when I was in America.
"He went to my university. To see him in and around the campus every now and again was amazing."
Russo scored ten goals in 20 WSL games for Man United last year and has 11 goals in 22 matches for her country.
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She is one of the most prolific strikers around and still has a long career ahead.
But before she begins her Arsenal adventure, she will lead the line for the Lionesses at the FIFA Women's World Cup.
And don't be surprised to see Russo grow her incredible international goal record as Sarina Wiegman's team look to add to their Euro 2022 triumph in England.
But whether it be for club or country, Russo will continue to wear the number 23 on her shirt.