Running for the presidency are incumbent Hassan Rouhani, hardline cleric and former Attorney-General Ebrahim Raisi, former Vice-President Mostafa Hashemitaba and conservative candidate Mostafa Mir-Salim.
Any candidate who gains the support of more than 50 percent of voters will become the country's president.
However, if no candidate reaches this threshold, a run-off election will be carried out between the two presidential hopefuls who receive the highest number of votes.
Speaking to Sputnik, Kozhanov predicted that the main competition will take place between Hassan Rouhani and Ebrahim Raisi, something that he said is confirmed by the latest opinion polls and Iranian experts' forecasts.
In addition, it is worth taking into account the charisma of these two political figures, who clearly overshadow the other presidential candidates, according to Kozhanov.
"Making predictions on who will finally win is very dangerous and difficult. The Iranian elections are known for their being influenced by a factor of unpredictability," he said.
Kozhanov, however, added that "judging by the current situation, Rouhani has every chance of being re-elected for a second term."
"During [the pre-election] debates, Rouhani managed to demonstrate that he is much better than his opponents, even from the point of view of the discussion," Kozhanov said.
"For Russia, strictly speaking, it doesn't matter who will win because the political field [in Iran's elections] is represented by different gradations of conservative forces; they all know full well that under the current state of affairs, Iran has no alternative but to continue in maintaining a sustainable dialogue with Russia," he concluded.
Earlier, Russian Foreign Ministry Spokeswoman Maria Zakharova said that "how the elections in Iran will be taking place is exclusively within the competence of the Iranian people."
Zakharova recalled that traditionally, Russia's position on an electoral process is in line with the UN Charter, which clearly warns against meddling in the internal affairs of other countries and exerting pressure on a state.
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