Australia vs England, 4th Test, Day 2, Melbourne

Joe Root walks out to field ahead of day two of the Fourth Test

Steven Smith is bowled out by Tom Curran, giving England their first wicket of the day

Tom Curran celebrates dismissing Steven Smith, his maiden Test wicket

Mitchell Marsh is out bowled by Chris Woakes

Shaun Marsh scored a vital fifty to push Australia's score past 300

Stuart Broad appeals for LBW against Shaun Marsh

James Anderson celebrates after taking the wicket of Tim Paine

Broad ended with four wickets to his name

Cook helped England off to a solid start

Josh Hazlewood celebrates with his teammates after dismissing James Vince

Steven Smith reacts after dropping a catch that would have dismissed Alastair Cook

Cook and Root put on a defiant stand to give England the advantage

Root ended the day 49*

Alastair Cook raises his bat as he leaves the ground after scoring his hundred