Playing as a defensive midfielder for Bordeaux, Sertic does a similar sort of job to Michael Carrick in that he keeps the ball ticking over for his team and makes the sort of interceptions that can often go unnoticed.
Sertic however, has the technical ability to offer much more going forward. He is able to make long Steven Gerrard style passes and when he gets forward he is more than capable of burying the ball in the net.
Sertic has qualified to play for Croatia at international level and seems like a good bet to take Brazil by storm. This would only increase his price tag. Perhaps some team will be tempted to snap him up in January on the cheap.