Triantafyllopoulos with Greece U19
|Full name||Konstantinos Triantafyllopoulos|
|Date of birth||3 April 1993|
|Place of birth||Korinthos, Greece|
|Height||1.86 m (6 ft 1 in)|
|Playing position||Centre back|
* Senior club appearances and goals counted for the domestic league only and correct as of 28 November 2015.
Konstantinos "Kostas" Triantafyllopoulos (Greek: Κώστας Τριανταφυλόπουλος; born 3 April 1993) is a Greek footballer currently playing for Asteras Tripoli in the Greek Superleague. He plays as centre back and comes from the club's youth ranks.
On 30 September 2012, during a Superleague match vs. Asteras Tripolis, he made his debut for the men's team with Panathinaikos. In his first season as a Panathinaikos' player, Triantafyllopoulos was able to become the first choice for the center of defence. At the end of the season, Triantafyllopoulos signed a contract extension for three years. On 22 January 2016, Triantafyllopoulos signed a 3,5 years contract with Asteras Tripoli, despite the rumours that he will sign to Panionios, as part of Olivier Boumale transfer to Panathinaikos. His former club will keep a percentage on profit from his next transfer.  
As of 6 February 2015
- "Panionios also to pick a player for Boumale's transfer". www.sdna.gr. 23 December 2015.
- "Έκλεισαν Τζανδάρης και Τριανταφυλλόπουλος στον Πανιώνιο!". www.football-land.gr. 10 January 2016.
- "Asteras Tripolis announce Triantafyllopoulos' capture". www.sdna.gr. 22 January 2016.
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