Kemar Roach rocked Australia's revamped top-order in five overs of carnage, leaving them in all sorts of trouble at 24 for 4 at dinner after Kevin Sinclair scored an impressive half-century on Test debut to help West Indies post an imposing 311 on day two at the Gabba. Cockroach took three wickets, including two off the last two wads of the meeting, to leave Australia reeling on the second day after they battled to push over the West Indies tail in the initial an hour and a half of play as they posted the second-most noteworthy complete by any group against Australia in 12 pink-ball Tests. Steven Smith was caught lbw in Bug's opening over of Australia's innings, rearranging back and across excessively far to a ball that pinched in and hit him flush before off stump. Nitin Menon at first gave it not out yet it was crushing center ready following projection. Five balls later, Marnus Labuschagne was settled battling at a sharp lifter from Alzarri Joseph that was well wide of his body, and the thick edge was snaffled by a flying Sinclair at third slip jumping to one side. Cameron Green entered and played an exquisite off-drive to track down the rope, however at that point quietly chipped an overpitched conveyance directly to Kraigg Brathwaite at mid-off to gift Insect a second. Next ball, Travis Head was choked down the leg side, stimulating a half-volley to manager Joshua Da Silva to screeches of joy from the West Indies group. Prior, Sinclair and Bug baffled Australia's bowlers toward the beginning of the day meeting, batting through the main hour without misfortune. Insect was the enduring item while Sinclair did the heft of the scoring. Australia's quicks were left disappointed as the second new ball relaxed rapidly and offered next to no sideways development in spite of Brisbane's moistness and weighty overcast cover. Australia set a few extremely guarded fields with a profound point set over the course of the early daytime permitting simple singles to be taken out. The organization was just broken as a result of a gigantic mistake. Cockroach protected a ball to mid-off and required a solitary, however Sinclair got a brief look at Labuschagne diving in and settled on an extremely late decision of no with Bug currently mostly down. He slipped over attempting to slow down and was run out effortlessly. Australia might have eliminated Sinclair on 30. He jabbed Pat Cummins directly to crevasse and Green spilt a sitter at thigh level. Sinclair made Green and Australia pay for certain phenomenal shots from there on. He cleared Nathan Lyon for four and afterward lobbed him back to front over mid-off in successive balls to move from 40 to a lady 50 years. He fell next ball, running beyond a ball that floated away and was befuddled by Alex Carey, who required two nibbles to finish the take.