Karachi, Pakistan:Captain Mahela Jayawardene and Thilan Samaraweera broke the 52-year-old world record for a fourth wicket stand on Sunday as Sri Lanka posted a huge total against Pakistan in the first Test.
Sri Lanka declared its first innings at 644-7 and Pakistan - needing 445 runs to avoid follow-on - lost opener Salman Butt (23) in Muttiah Muralitharan's third over of the innings to finish day two at 44-1.
Debutant Khurram Manzoor was unbeaten on 18 while newly appointed captain Younis Khan was yet to score.
Jayawardene and Samaraweera put on 437 runs for the fourth wicket, bettering the previous record of England's Peter May and Colin Cowdrey, who got 411 against the West Indies at Edgbaston in 1957.
Jayawardene, who also shared in the world record partnership for any wicket - 624 against South Africa in 2006 - scored 240 while Samaraweera made 231 to notch his maiden double century.
Jayawardene - leading Sri Lanka in a series for the last time as he will step down after the second Test at Lahore - was finally out to a brilliant diving catch by wicket-keeper Kamran Akmal from a mistimed sweep off Shoaib Malik's off-spin.
It prompted a sudden rush of wickets as Samaraweera - bowled by leg-spinner Danish Kaneria (3-170) - went in the next over and Malik found a thin edge off Tillakaratne Dilshan's (0) bat in the last over before tea as Pakistan claimed three wickets for no runs.
Jayawardene, who was dropped three times on the first day, hit 32 fours and faced 423 balls.
Samaraweera hit 31 boundaries and faced 318 balls in his composed and chanceless knock, with Pakistan bowlers getting little from a placid National Stadium track.
Sri Lanka declared half an hour into the last session after posting their best ever Test total against Pakistan. The previous best was 528 at Lahore during the Asian Test championship match in 2002.
It was the eighth biggest partnership of all time and the second biggest in Pakistan.
Samaraweera and Jayawardene, who joined with the total of 177-3 when Kumar Sangakkara's wicket fell in the second session Saturday, punished the loose deliveries and played some attractive drives on both sides of the wicket in their marathon seven and a half hour partnership.
The game had been a difficult one for Pakistan in their first Test for 14 months, and for Younis, who had taken over as captain.