And then there were two
There are still challenges ahead but Al Ain FC and Vissel Kobe certainly look like title contenders after staying perfect with their fourth consecutive wins. UAE's Al Ain cruised to an impressive 4-1 win against Al Ittihad Club while Japan's Vissel showed resilience in a come-from-behind 3-2 win against Ratchaburi FC. While both will feel it is too soon to harbour thoughts about lifting the coveted trophy, victory on Matchday Five will almost surely confirm their progression to the Round of 16.

Duo in dire straits
While Al Ain and Vissel are flying high, the same can't be said about Al Gharafa SC and Newcastle Jets FC, with both yet to register points on the board. With the League Stage already at the midway point, both have to engineer a change in their fortunes if a top-eight finish in their respective zones is to be achieved.

Goal-den matchday
Despite there being three goalless draws, Matchday Four was a joy for the fans with a whopping 64 goals - 32 each in the respective zones. The craziest score was Port FC's 7-4 defeat of Beijing FC, while there were seven other games that witnessed five or more goals.

Al Ahli being tested
After four matchdays, Al Ahli Saudi FC must know that they have a fight on their hands in their bid to lift the trophy for a third consecutive edition. While still unbeaten and well placed to advance, the Saudi Pro League side have found the going much tougher in the League Stage this season and must shift into a higher gear for their remaining games.

Thailand trio need quick turnaround
Thailand's three representatives have found the continental challenge tough as they sit between 12th and 14th place at the halfway stage. Port FC are the only side to have savoured victory while Buriram United have three draws to their name. Ratchaburi FC have a sole point and all three have much to do in the second half if they are to extend their continental adventure into the Round of 16.