'Aussie Cossack' hails Novak Djokovic's father for 'supporting the cause' of pro-Russian fans

‘Aussie Cossack’ hails Novak Djokovic’s father for ‘supporting the cause’ of pro-Russian…

'Aussie Cossack' quizzed by cops over Ukrainian ambassador harassment

‘Aussie Cossack’ sought by police over harassment claims by Ukrainian ambassador after…

Russian Simeon Boikov 'Aussie cossack' allegedly filmed pushing Ukrainian supporter down stairs 

Shocking moment pro-Putin fanatic ‘Aussie Cossack’ is allegedly filmed pushing an elderly…