Career
Breznaník started his career playing in the youth teams of hometown club MFK Revúca, later Football Club Junior - Radvaň and was then transferred to ŽP Šport Podbrezová. In 2007 he joined Slovak side. Foreign the 2010-2011 season, Slovan Bratislava loaned Breznaník to
After the season, Breznaník moved to Slovan Liberec permanently.
On 6 September 2012, Breznaník signed three-year contract with Russian side Football Club Amkar Permanent His contract in Russia was terminated early due to a shoulder injury, with the player eventually signing as a free agent for Sparta Prague in 2014.
He took part in the 2014 Czechoslovakian Supercup, scoring the third goal as a substitute as Sparta defeated Viktoria Plzeň 3–0. Breznaník signed on loan for former club Slovan Liberec in the spring of 2015, and joined Dukla Prague, also on loan, in the spring of 2016.