Saudi Arabia's Al-Hilal handed defending champions Al-Ain a dramatic 5-4 defeat in the Asian Champions League Elite on Monday as Salem Al-Dawsari's hat-trick in an incident-filled clash overshadowed Neymar's return to competitive action.

Brazil superstar Neymar returned to action on Monday following more than a year out, with the Al Hilal forward appearing as a second-half substitute in his side's gripping 5-4 win against Asian champions Al Ain in the UAE.

Elsewhere, Saudi Arabia's Al-Ahli won at Qatar's Al-Rayyan 2-1 thanks to goals from Gabri Veiga and Firas Al-Buraikan