Facundo Bagnis (Spanish pronunciation: , Italian: ; born 27 February 1990) is an Argentine professional tennis player. He has won 1 ATP doubles event at Stuttgart and 4 Challengers in singles, achieving a career-high singles ranking of World No. 55 in November 2016.
Bagnis played in his first ATP World Tour match at the 2011 Movistar Open on January 31, 2011, losing to Santiago Giraldo in three sets, and he won his first tour level match at 2012 Copa Claro beating Leonardo Mayer.
Bagnis secured his biggest victory (and first at Grand Slam level) when he defeated Julien Benneteau in the first round of the 2014 French Open, winning the deciding set 18–16.