The country's parliamentary speaker, Bronislaw Komorowski, had earlier said that "I believe that Poland will be among those states to recognize the independence of Kosovo, guided, in principle, by the fact that no one has found an effective way to bring together two mortal ethnic enemies."
Kosovo's parliament unilaterally declared independence on February 17.
Belgrade called the move illegal. However, the United States and over a dozen Western countries have so far recognized Kosovo's independence.
Russia remains a staunch opponent of independence for the "world's newest state."
Addressing Serbian Prime Minister Vojislav Kostunica at talks in Belgrade on Monday, Russian First Deputy Prime Minister Dmitry Medvedev, the man widely-expected to triumph at Sunday's Russian presidential polls, reaffirmed that Moscow would maintain its firm stand on the territorial integrity of Serbia.
"We believe that Serbia is a unified state, whose jurisdiction extends over its entire territory, and we will maintain this position in the future," Medvedev said.
"It is unacceptable that for the first time in the post-war history, a country [Serbia], which is a member of the United Nations, has been divided in violation of all the principles used in resolving territorial conflicts," Russian Foreign Minister Sergei Lavrov said in an interview with Russia's Vesti 24 television channel on Monday.
Protests against Kosovo's independence turned into street riots in Belgrade last week leaving at least 130 people injured. Riots continued on Monday and Tuesday.
Protesters have so far attacked the embassies of the United States, Croatia, Belgium and Turkey, throwing stones and Molotov cocktails.
The U.S. embassy suffered the most damage and several floors were set on fire. U.S. diplomats later said that the remains of a charred body had been discovered in the building. The body was identified on Saturday as a Serb national.