The experienced Mustafizur Rahman comes into the attack as Bangladesh need a breakthrough to check Australia's charge.
Singles from the first three balls before Head mistimes the pull shot which goes towards the fielder at mid-on.
However, Head smashes the next ball straight back over the bowler's head for a six.
The left-hander makes room to smash the short wide delivery for a four to end the over with a boundary.
An expensive opening over from Mustafizur as he concedes 13 runs in the fifth over.
Mahedi to bowl his third over. Warner pulls the first ball to deep square leg for a single as Australia race past 50 in 5.1 overs.
Head looks to swing across the line but misses as the ball goes off the pads for a leg bye.
Warner continues the attack as he pulls the last ball for a six over midwicket.
Australia in control as they race to 59 for no loss in six overs, with Warner on 28 from 17 balls and Head on 30 from 19 balls.