The A-League is back! Here are the biggest talking points from an opening round that saw Western United win their inaugural match and Sydney FC shoot to the top of the table.

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The under-23 rule

Football Federation Australia announced Friday that A-League regulations had been amended to allow two extra substitutes on the bench...

Socceroos coach Graham Arnold says he is not responsible for the actions of four Australian under-23 players who are being investigated by the FFA following an incident in Cambodia earlier this year that happened under his watch.

The Olyroos were in Phnom Penh at the end of March playing in a qualifying tournament for next year's Olympics and a complaint was made against the players regarding the final night of their trip.

"Sometimes people take their own responsibility," said Arnold, when asked...

After the longest preseason in football, the battle for the Toilet Seat finally returns. The boardroom struggle for control means season 2019-20 is one of transition for the A-League, while a lack of blockbuster signings underlined the more subdued lead-up.

Still, there are plenty of talking points. A new club and another on the way, and coaching changes to rival the player merry-go-round.

Here's all you need to know about every team ahead of Friday night's opener between Adelaide United and Sydney...