Yasir Shah scalped a four-wicket haul as West Indies slumped to 93-4 and trailed by 28 runs in the second innings against Pakistan at the end of the fourth day's play of the opening Test at the Sabina Park in Kingston on Monday.
After captain Misbah ul Haq became just the sixth batsman in Test history to be left stranded on 99 not out as Pakistan were dismissed for 407 in their first innings, the hosts, trailing by 121 runs, were reduced to 93 for four at stumps with Shah taking all four wickets.
They go into the final day needing another 28 runs to erase the first innings deficit with the pair of nightwatchman, Devendra Bishoo and debutant Vishaul Singh, expected to be under immense pressure, especially from the rampant leg-spinner, when play gets underway on a wearing pitch on the final morning.
Having conceded a 121-run lead in the first innings, the Caribbean side began their charge in the final session on Day 4.
After losing opener Kraigg Brathwaite cheaply for 14 runs, Kieran Powell (49) and Shimron Hetmyer (20) did provide the hosts with some fight back as the duo shared a crucial 50-run stand for the second wicket.
However, Yasir ripped through the top order of the West Indies second innings in the final session to put Pakistan on course for victory and leave the home side reeling.
The spinner took all four wickets of the day.
SCOREBOARD (At stumps on Day 4)
West Indies 1st Innings: 286
Pakistan 1st Innings: (overnight 201 for 4)
A Ali c Dowrich b Joseph 15
A Shehzad lbw Holder 31
B Azam b Gabriel 72
Y Khan c Brathwaite b Gabriel 58
Misbah ul Haq not out 99
A Shafiq c Dowrich b Gabriel 22
S Ahmed b Bishoo 54
M Amir c Dowrich b Joseph 11
W Riaz b Joseph 9
Y Shah run out 8
M Abbas lbw Chase 1
Extras: (B-4, LB-10, NB-12, W-1) 27
Total: (all out in 138.4 overs) 407
Fall of wickets: 1-23, 2-54, 3-185, 4-186, 5-236, 6-324, 7-341, 8-355, 9-373, 10-407
Bowling: S Gabriel 29-6-92-3, A Joseph 31-8-71-3, J Holder 30-7-65-1, D Bishoo 33-2-106-1, R Chase 8.4-1-37-1, K Brathwaite 7-1-22-0
West Indies 2nd Innings:
K Brathwaite b Shah 14
K Powell c Younis Khan b Shah 49
S Hetmyer b Shah 20
S Hope lbw Shah 6
D Bishoo not out 0
V Singh not out 0
Extras: (LB-4) 4
Total: (for 4 wkts in 28 overs) 93
Fall of wickets: 1-22, 2-72, 3-84, 4-89
Bowling: M Amir 9-2-11-0, M Abbas 6-0-21-0, Y Shah 9-0-33-4, W Riaz 4-0-24-0.
IMAGE: Pakistan's Yasir Shah celebrates
Photograph: Francois Nel/Getty Images