Tony Popovic's side became the first Australian side to win the competition last season, but their defence has begun slowly with just one win from their opening four matches.
Having taken the lead through Kerem Bulut after 12 minutes at Pirtek Stadium, Wanderers looked on course to claim all three points, however Ko Yo-han levelled things up with a close-range finish with 18 minutes to go.
United Arab Emirates' Al Ahli closed the gap on their Saudi Arabian namesakes in Group D after Everton Ribeiro netted the only goal in their 1-0 win over Nasaf.
The gap at the top of the group is now just three points after an Omar Al Somah double rescued a point for Saudia Arabia's Al Ahli on their trip to Tractor Sazi, the striker bagging his second in the final minute to earn a 2-2 draw.
Ali Reza Mansourian’s side replace Al Ain at the summit after he UAE outfit shared a 1-1 draw with Pakhtakor.
Last season's semi-finalists led after 20 minutes through Jires Kembo-Ekoko but Uzbekistan striker Igor Sergeev ensured a share of the spoils in first-half stoppage time.
