Dallas Mavericks star Luka Doncic says singing to self key to laying off referees - ESPN

Luka Doncic says he has started to sing to himself as a way to avoid venting his frustration at referees.

PHILADELPHIA -- Dallas Mavericks superstar Luka Doncic has declared he is done ranting at referees and has discovered a trick to help prevent him from venting his frustration when the whistle doesn't… [+2070 chars]

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