An own goal by Wycombe goalkeeper David Stockdale put the visitors ahead before Anis Mehmeti’s low strike drew Wycombe level.
The Chairboys then went ahead courtesy of Sam Vokes’ close-range header, but Sunderland managed to go in level at half-time following a neat finish from Ross Stewart.
Sunderland improved after the break and went close on several ocasions in a thrilling contest.
It then looked like Stewart had scored the winner when he put the Black Cats ahead in stoppage-time, only for Joe Jacobson to snatch a dramatic leveller.
Our chief Sunderland writer Phil Smith has delivered his verdict on how each Black Cats player fared at Adams Park
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Sunderland improved after the break and went close on several ocasions in a thrilling contest.