Asserting that Pakistan remains the "epicentre of terror", Prime Minister Manmohan Singh today said expectations have to be "toned down" over his meeting with Nawaz Sharif on Sunday. "I look forward to meeting with Prime Minister Nawaz Sharif even though the expectations have to be toned down given the terror arm which is still active in our sub-continent," Dr Singh told reporters in the Oval Office after he met US President Barack Obama.