Adelaide United has signed forward Sergio van Dijk for the AFC Champions League.

Van Dijk, who made 55 appearances for the Reds between 2010 and 2012, has signed as Adelaide's 'Asian import' for the Champions League.

“It feels great to be back with Adelaide United, I'm happy that I can play here in South Australia again and I hope I can add something extra to the team and be successful in Asia,” van Dijk said.

“The style of football that we play has definitely changed since I was here last, but I know I can suit it. I believe the more attacking diversity that we have, the more dangerous we can be in the competition and to our opponents.

“From previous experiences in the Champions League, I've seen the Australian football way has been successful and definitely more physical than some of the Asian teams, which has been effective.

“Even after I left the Club a few years ago, people still supported me and followed me and I hope I can help the team and the history of this great club."

Adelaide face Shandong Lueng Taishan in the AFC Champions League play-off on Tuesday February 9 at Hindmarsh Stadium.