Mortimer, Doran steady Australia. Need 76 in 20 overs.
Morgan completes half-century as Australia cruise along after brisk start.
Jaron Morgan attacks bowlers to apply pressure early on.
Pooran scores maiden U-19 ton and shares record ninth wicket stand with Jerome Jones.
Pooran's unbeaten ninth wicket partnership with Jerome Jones frustrates Australia.
West Indies batting fails to click as Pooran fights on to take them past 100.
Australia will take on West Indies while South Africa will play Afghanistan in the quarter-finals.