Andy Murray believes players need to be more careful about how they speak to officials and that tennis could learn a lot from rugby about the issue.
Murray's second-round opponent at Indian Wells on Friday is Andrey Rublev, who was disqualified in Dubai last week for unsportsmanlike conduct.
The world number five screamed in the face of a line judge following a disputed call in the final set of his semi-final with Alexander Bublik.
"All of us players - and I think I've been guilty of it myself - we need to be a little bit careful of the way that we speak to officials and treat officials," Murray said.