Connor Wickham won't be the last sale at Sunderland this summer.
The Black Cats agreed a fee with Palace for the 22-year-old this week, and Wickham was in London yesterday to discuss personal terms and undergo a medical, says the Evening Chronicle.
Sunderland are also looking to sell on a number of players who are surplus to requirements, including Liam Bridcutt, Will Buckley, Valentin Roberge and Charis Mavrias.
Wickham was one of the biggest earners at Sunderland.