The Asian Football Confederation (AFC) on Wednesday announced an expansion of the flagship Asian Cup from 16 to 24 teams but killed off the lower-level Challenge Cup.

The 2019 Asian Cup will climb to 24 teams but next month's Challenge Cup in the Maldives will be the last.

Preliminary qualifying for the Asian Cup and World Cup will also be combined, AFC said.

Teams will be divided among eight groups with the pool winners and four best-placed second sides reaching both the Asian Cup and the final World Cup qualifiers. The next 24 best teams will be split into six groups of four to battle it out for the remaining Asian Cup spots.