Jack Mingjie Lin (born April 15, 1999) is an inactive professional tennis player from Canada.

Mingjie Lin reached a career high ATP men's singles ranking of 605 on July 15, 2019.

[1] He made his ATP Tour debut by receiving a wild card to the 2019 New York Open,[2][3] where he lost his 1st round match to eventual finalist Brayden Schnur.

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