Filip Kostić (Serbian Cyrillic: Филип Костић, pronounced ; born 1 November 1992) is a Serbian footballer who plays for Eintracht Frankfurt. He most frequently plays on the left wing.
Kostić made his senior debut with Radnički Kragujevac in 2010 at the age of 17. This was after the club was promoted to the Serbian SuperLiga from the Serbian First League. He began attracting the interest of several clubs including Red Star Belgrade, Anderlecht, Udinese, and Tottenham Hotspur. On 15 April 2012, he was named starting left winger in Sportal's ideal team of round 24 in the SuperLiga.
On 4 April 2012, he signed a contract with Eredivisie side Groningen and moved to the Netherlands in June 2012 after the end of the season. He made his debut for Groningen on 21 October 2012. After getting little playing time, Kostić finally began showing promising potential from the beginning of the 2013–14 Eredivisie; he attracted media attention after playing a brilliant game in which he had one assist against NEC, and then on 25 August he added to his reputation of play-making by assisting twice against Go Ahead Eagles. Finally, on 20 October 2013, Kostić scored his first ever goal for Groningen in a 1–0 win against PSV Eindhoven. Kostić received criticism for a media interview after drawing 0–0 with Aberdeen F.C. in the second round of the Europa League qualifiers. He went on record after the match saying, “We go home happy, we have done 80% of what we need to go through”. Groningen went on to lose the tie with the Scottish club 1–2 at the Euroborg. Aberdeen winger Johnny Hayes was later quoted as saying "I was quite happy ramming their words down their throats".