Defender Harry Van Der Saag (19), midfielder Ryan Teague (17), and winger Marco Tilio (18) have all signed their first professional deals with the Sky Blues. 

All three players were apart of Sydney FC's record breaking NPL 1 side that finished with 21 points last season, their highest total ever. 

Teague and Tilio have represented the Olyroos and the Joeys respectively with Teague having taken the armband as captain for Australia's U17's side for a number of years.

All three players have had a look in for the Sydney FC's pre-season as well as Teague and Van Der Saag appearing in the club's pre-season friendly against European football giants Paris Saint-Germain. 

Sydney FC Head Coach Steve Corica believes all three will add quality to the squad. 

"They are all excellent young players with a great deal of potential," said Corica. "They've each performed very well in pre-season and during their record breaking NPL season.

"We've got a fantastic crop of young players and it was tough to pick just three for these contracts.

"With increased exposure to A-League training loads and physicality, I believe these boys will make the next step up." 

Corica gave three Sydney FC youngsters their A-League debut last season with Cameron Devlin, Luke Ivanovic and Joel King playing their first matches in the league.