Replays could not determine whether Younis Khan had taken Kumar Sangakkara's catch cleanly, Pakistan v Sri Lanka, 1st Test, Abu Dhabi, 4th day, October 21, 2011© Associated Press
Younis Khan attempts to field at slip off Lahiru Thirimanne, Pakistan v Sri Lanka, 1st Test, Abu Dhabi, 4th day, October 21, 2011© Associated Press
Aizaz Cheema appeals unsuccessfully against Kumar Sangakkara, Pakistan v Sri Lanka, 1st Test, Abu Dhabi, 4th day, October 21, 2011© Associated Press