Toby Alderweireld has become one of Qatari football's most-expensive transfers ever, but he is far from the most famous to have made such a move.
Last year's ACL runners-up Persepolis came back to hand Qatar's Al Rayyan a 3-1 defeat to continue their perfect start to the 2021 campaign.
Far from diluting the competition pool, the new teams in the expanded AFC Champions League showed they can match up against the tournament's best.
Goa showed they are no pushovers with a hard-fought draw vs a superior opponent on their ACL debut.
Tractor FC struck late to salvage a 3-3 draw against Pakhtakor Tashkent after all six goals were scored in the second half.
Goa put on a defensive masterclass to hold Al Rayyan to a goalless draw.
Goa conceded a 89th minute goal after having taken the lead in as early as the third minute.
Here's what to expect as FC Goa become the first Indian side to compete in the ACL group stages.
Ahead of the start of West Zone action in AFC Champions League 2021, we look at the five major talkings points from Asia's premier club competition.