That's among voters who intend to cast ballots and have already made up their choice, according to a poll by the Rating Sociological Group.

Another 15.5% of those polled would vote for the leader of the pro-Russian Opposition Bloc Party Yuriy Boyko, and 14% – for former President Petro Poroshenko.

Another 9.3% would cast ballots for leader of the Batkivshchyna (Fatherland) Party Yulia Tymoshenko, 6.4% – for the leader of Syla I Chest' (Strength and Honor) Party Ihor Smeshko, and 3.6% each – for leader of the Radical Party Oleh Liashko, showman Serhiy Prytula, and former Prime Minister Volodymyr Groysman.

Read alsoZelensky hopes COVID-19 vaccine to become available in 2021Other politicians have been rated below 3%. The number of those who have not made up their choice is about 14%.

At the same time, the dynamics show Zelensky is losing electoral ground.

It is also noted that 35% of those surveyed approve of Zelensky's performance, while 57% don't. Also, 23% approve of the actions of Chairman of the Verkhovna Rada Dmytro Razumkov (55% disapprove and 23% find it difficult to assess). Meanwhile, only 14% approve Prime Minister Denys Shmyhal's performance (59% disapprove and 27% find it hard to assess).

The poll was run on September 3-6 via face-to-face interviews among the population aged 18 and older. Some 2,000 adult respondents were polled in all regions of Ukraine except Crimea and other Russia-occupied parts of Ukraine, namely certain districts in Donetsk and Luhansk regions. The margin of error is no more than 2.2%.

Zelensky's ratings: background

A poll run in late June gave Zelensky 34.6% of support in potential elections.

The survey conducted in late August-early September showed 44% of respondents trusted President Zelensky, while 51% didn't. The trust level was higher than that in relation to President Poroshenko (25%) and Viktor Yanukovych (26%) after the same term in office.