2015–16 Sydney FC season Mariners), when the club signed Matt Simon. The club then lost the services of talented Socceroos midfielder Terry Antonis when he was transferred to Greek powerhouse PAOK on 19 August 2015. On 25 August 2015, Sydney FC became the first club to utilise the "Mature Age Rookie" concept, signing Alex Mullen on a one-year deal. The club also announced the signing of veteran Sydney FC gloveman Ivan Necevski (who returned to club after a stint with New South Wales Premier League outfit Rockdale City Suns) alongside Sydney FC Youth captain, Jacob Tratt. Sydney FC began the regular season at home
2015–16 FC Basel season Grimaldi Forum in Monaco and Basel were drawn into Group I. The draw for the round of 32 was held on 14 December 2015. The first leg was played on 18 February, and the second leg played on 25 February 2016. "4–4 on aggregate. Basel won on away goals." The draw was held on 26 February 2016. The first leg played on 10 March, and the second leg played on 17 March 2016. "Sevilla won 3–0 on aggregate." 2015–16 FC Basel season The 2015–16 FC Basel season was the 123rd season in club history and the club's 21st consecutive season