Former Greek prime minister Alexis Tsipras calls on his successor, Stefanos Kasselakis, to again seek a mandate from leftist party's grassroots

A survey showed that Kasselakis came first in preference as person of the year against Prime Minister Mitsotakis

More than seven in 10 respondents in the most recent opinion poll in Greece this week, conducted by MRB, consider there's no formidable political opposition at present.