The Armenian and Azerbaijani presidents met here Friday in the latest Moscow-mediated attempt to end a long-simmering dispute over a separatist enclave where there was a war in the 1990s.
Armenian state-run television quoted Sarkisian as saying earlier that "no document will be signed" in Moscow over the future of the Azerbaijani enclave of Nagorny Karabakh.
The three leaders last met in Saint Petersburg in June.
Observers praised the two nations' effort to seek compromise but said the talks were unlikely to produce any breakthrough.
"The fact that two sides sat down at the negotiating table defuses tension and increases the probability that the conflict may be settled by peaceful means," a senior parliament member from the ruling Eni Azerbaijan party Mubariz Gurbanly told AFP.
"However, one should not expect any tangible result of the meeting as the Armenian side maintains an unconstructive approach."
Azerbaijani political analyst Eldar Namazov said however the presidents could lay the foundation for longer-term progress, even if no document was signed.
"It is a long-term process and in the case any progress is made at the Moscow meeting Friday and Saturday, we can come, by the end of the year, to a situation when signature of a certain document is possible."
Armenian analyst Alexander Iskandarian, director of the Caucasus media institute said: "I do not expect any changes regarding the Karabakh settlement" from the talks.
"The presidents will make another statement that some progress was made in the negotiation process."
Armenia's Foreign Minister Edward Nalbandian also indicated that Yerevan was not in the mood for compromise on the issue.
"Armenia will not make any accords without the consent of the Karabakh's people and leadership. Armenia insists that Karabakh must be a full member of the negotiation process."
At the Group of Eight summit in Italy last week, Russia, France and the United States issued a statement pledging to continue their support of the peace talks and calling on Aliyev and Sarkisian to iron out their disagreements.
Nagorny Karabakh, an enclave of Azerbaijan with a largely ethnic Armenian population, broke free of Baku's control in the early 1990s in a war that killed nearly 30,000 people and forced two million to flee their homes.
Shootings between Armenian and Azerbaijani forces in the region remain common despite a 1994 ceasefire.
The three-party meeting has been timed to coincide with an informal summit of ex-Soviet nations in Moscow on Saturday.
Source: AFP Global Edition