West Indies have reached 5-218 at stumps in their first innings after three days of the third Test in Dominica, trailing Pakistan by 158 runs.
Just as they had to at the end of day two, when the West Indies reached 0-14 from 11 overs, the home side was made to grind during all of day three.
Legspinner Yasir Shah has 3-108, with all of his wickets coming in the morning, while only one fell in the middle and tea sessions of the three-Test series which is locked at 1-1.
That's not counting Roston Chase, who went off retired hurt on 60 with an elbow injury in the last session.
Chase grabbed a single to reach his third Test 50 in 113 deliveries on the last delivery before Pakistan took the second new ball.
Mohammad Abbas got the nod and was hit for two boundaries by Chase in his first over back.
But a hostile delivery from Amir struck Chase on his right elbow.
He received on-field treatment before retiring hurt in the 84th over with Pakistan on 4-183.
That exposed Pakistan's innings to the new ball at just the wrong time. Three overs later, left-hander Vishaul Singh was out lbw for eight to Abbas at 5-189, and failed to overturn the decision on a wildly optimistic review.
Shane Dowrich was 20 not out and Jason Holder undefeated on 11.
Pakistan scored 376 in their first innings.
The tourists are chasing their first Test-series win in the Caribbean in a landmark match for the tourists with both Misbah-ul-Haq and Younis Khan retiring from international cricket afterward.
