Sri Lanka [ Images ] spinner Ajantha Mendis [ Images ] is developing a new delivery that could emerge in the One-day series against Australia [ Images ].

The unorthodox spinner claimed 6-16 -- the first six-wicket haul in international T20 cricket -- as Sri Lanka wrapped up a 2-0 series sweep with an eight-run win in Kandy on Monday.

Remarkably Mendis, 26, is trying to cement his spot in the Sri Lanka team after being snubbed for the recent tour of England [ Images ] and he's wary of changing much for the five one-day matches against the touring Australians.

"I don't intend to do many changes for the ODIs. I am developing a new ball," The Age quoted Mendis, as saying.

"But I haven't still tried that and hopefully it will come out soon," he added.

Mendis' arsenal already includes his signature 'carrom ball', flippers, off-breaks, leg-breaks, top-spinners and googlies.

Mendis said the England tour setback had probably contributed to his outstanding form.

"Missing out on England matches may have been one reason. I worked extremely hard to get back into the team," he said.