Nicolás Barrientos

| residence = Cali, Colombia | birth_date = | birth_place = Colombia | height = | college = University of West Florida | turnedpro = 2009 | plays = Right-handed (two-handed backhand) | careerprizemoney = $ 614,727 | singlesrecord = 1–5 (in ATP World Tour and Grand Slam main draw matches, and in Davis Cup) | singlestitles = 0 | highestsinglesranking = No. 237 (21 September 2015) | currentsinglesranking = | AustralianOpenresult = | FrenchOpenresult = | Wimbledonresult = | USOpenresult = | doublesrecord = 48–49 (in ATP World Tour and Grand Slam main draw matches, and in Davis Cup) | doublestitles = 1 | highestdoublesranking = No. 50 (4 March 2024) | currentdoublesranking = No. 54 (15 July 2024) | AustralianOpenDoublesresult = 2R (2023, 2024) | FrenchOpenDoublesresult = 2R (2023) | WimbledonDoublesresult = 2R (2024) | USOpenDoublesresult = 2R (2014, 2023) | WimbledonMixedresult = 1R (2024) | medaltemplates-expand = yes |medaltemplates= }}

| updated = 15 July 2024 }}

Nicolás Barrientos (;.}} born 24 April 1987) is a Colombian professional tennis player. Barrientos reached his highest ATP singles ranking of world No. 237 on 21 September 2015 and a doubles ranking of world No. 50 on 4 March 2024. He has won one ATP doubles title at the 2024 Rio Open with Rafael Matos. He competes mainly on the ATP Challenger Tour both in singles and doubles. Provided by Wikipedia