Australian striker Joel Griffiths is returning home from China\'s Shanghai Shenhua to link up with Italian superstar Alessandro Del Piero at Sydney FC, the club said on Friday. Griffiths will officially start his two-year contract when his current deal with the Chinese club expires on 31 December. \"Sydney is my home, Sydney FC is a great club and has tremendous training facilities and I\'m looking forward to playing in the A-League again,\" said Griffiths, who will join his twin brother Adam at the Sky Blues. Griffiths, 33, has spent the last four years with Beijing Guoan and Shanghai Shenhua, where he scored 34 goals from 94 appearances in the Chinese Super League. He netted 28 goals in 60 A-League games for the Newcastle Jets before he left for China in 2008. Meanwhile, Portuguese winger Fabio Ferreira has signed a two-year extension with Adelaide United in the Australian A-League, the club said on Friday. Ferreira, 23, who spent a year at English Premier League giants Chelsea, has played every game for the Reds this season, scoring two goals. \"The club has been really good for me, as well as the team and the fans, I really like being here and I\'m excited that I will be staying in Adelaide for a longer period,\" Ferreira said. His re-signing follows the recent contract extensions of Argentine forward Jeronimo Neumann and naturalised Brazilian defender Cassio.