Bangladesh's Nayeem Hasan celebrates the wicket of Sri Lanka's Dinesh Chandimal during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Bangladesh's wicketkeeper Litton Das successfully takes catch to dismiss Sri Lanka's Dinesh Chandimal during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka plays a shot as Bangladesh's Litton Das watches during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka, right, inspects his helmet after he was hit by a ball during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Dinesh Chandimal plays a shot during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka celebrates his century as batting partner Dinesh Chandimal watches during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka plays a shot during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka congratulates Dinesh Chandimal for scoring fifty runs during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Dinesh Chandimal plays a shot during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.

Sri Lanka's Pathum Nissanka celebrates his fifty runs during the second day of the second cricket test match between Sri Lanka and Bangladesh in Colombo, Sri Lanka.