According to the Mirror, West Ham are keen on signing Balic this summer, with Tottenham Hotspur also interested in the youngster.
Balic, a 17-year-old midfielder, is highly rated in his homeland, and has spent the season playing with Hajduk Spilt.
He totalled 17 appearances in all, scoring six goals and registering two assists, and is part of the same youth generation that has developed Croatian wonderkids Mario Pasalic and Alen Halilovic - playing with Chelsea and Barcelona respectively.
The youngster is naturally a deep-lying playmaking midfielder, and has been likened to former Tottenham hero Luka Modric for his style of play and ability to read a game faster than his peers.
He has a £5 million buyout clause in his contract, which may seem excessive for a 17-year-old, but for a player of his impressive talent, the Under-19 Croatian international seems like a bargain signing.
West Ham boss Slaven Bilic is hoping his Croatian links will swing Balic in a switch to the Boleyn Ground, whilst Spurs can use the impressive developmental curve of Modric to show just how good Balic can become at White Hart Lane.