Bengal may be excited about having roped in Test cricket's leading wicket-taker Muttiah Muralitharan to revive its fortunes in the Ranji Trophy Plate League, but the Sri Lankan off-spinner says he is yet to sign a formal contract and his priority is his country. Speaking from Colombo on Tuesday, Muralitharan said he is still unsure about his availability though the Sri Lankan Cricket Board has given him a go-ahead.