The 2023 AFC Asian Cup round of 16 will deliver plenty of tantalising ties -- from heavyweight clashes to potential upsets.

In the blink of an eye, the 2023 AFC Asian Cup is now down to the knockout round.Two weeks of riveting group-stage action has delivered a last 16 with plenty of usual suspects but also a handful of surprise high-fliers.There will be no more second chances with teams needing to win four matches on the trot from now till Feb. 10 if they are to be crowned champions of Asia.Here, we look ahead at the storylines each round of 16 tie has produced.