Mary, from Gosford, NSW, decided to have the design done ahead of Arsenal's visit to Sydney this week.
The team, who Mary grew up watching as a girl in the UK, are visiting Australia for the first time in 40 years, so she was determined to do something special.
Mary's daughter shared an image of the new inking on Facebook
Facebook/Deborah Baker
Her daughter, Deborah, shared a public post on Facebook to show her mother's amazing gesture.