'Low IQ': Daniil Medvedev Slams Crowd for 'Booing' Him With Cristiano Ronaldo's 'Siu' Chant

Crowds during the Australian Open have been interrupting players by chanting "Siuuu," a trademark celebration of Portuguese Ronaldo in which he jumps high into the air while spinning before landing with his hands down by his side. Players including former no.1 Andy Murray has called the chant "highly irritating."