Adam Chadaj (Polish pronunciation: [ˈadam ˈxadaj]; born 1 May 1984) is a professional tennis player from Poland.

[1] He represented the Poland Davis Cup team in a 2005 tie against Estonia in Gdynia and featured in two singles rubbers, for wins over Mait Künnap and Mikk Irdoja.

[2][3] Soon after he made his debut in an ATP Tour level tournament when he was a wild card entrant into the main draw of the 2005 Idea Prokom Open in Sopot.

[4] On the Challenger circuit in 2005 his wins included Julien Benneteau, Nicolas Mahut and Sam Querrey.

In 2006 he won a second Challenger title, the doubles event in Telde, Spain, with Sweden's Michael Ryderstedt.