The international left back came on as a second half substitute for new club Austria Vienna.
Despite the introduction, the club lost the first leg 1-0 at the home of Kazakh side Tobol Kostanay.
Sun went on a season-long loan to the European club earlier this month.
The former Shanghai Shenhua star spent six months on loan with PSV Eindhoven at the start of 2007. He appeared in the Champions League with the Dutch club against PSV Eindhoven.