def get_top_10_country_list(country_data):
    """Returns dataframe for top 10 countries sorted by maximum cases"""
    df = country_data.max(level=0)['Cases'].reset_index().set_index('Country/Region')
    df.sort_values(by='Cases', ascending=False, inplace=True)
    df_top_10 = df.head(10)
    return df_top_10.index.tolist()