A defiant 93 by Sadeera Samarawickrama that preceded a spirited bowling effort helped Sri Lanka overcome Bangladesh by 21 runs in their Asia Cup Super 4 match in Colombo on Saturday. Sri Lankan captain Dasun Shanaka (3/28), spinner Maheesh Theekshana (3/69) and Matheesha Pathirana (3/58) backed it up in the bowling department as they bundled out Bangladesh for 236, after posting 257 for 9. The visitors offered a hard fight through young Towhid Hridoy (82 off 97 balls) but the home team just proved enough quality through their supreme bowling. Now the Lankans can make a genuine charge towards the final with two matches remaining, but Bangladesh's hopes of entering the title round were all but over after this setback. They had lost to Pakistan in the Super 4 opener at Lahore by 7 wickets on Wednesday.