Milos Raonic wears a mouth guard on court as protection from grinding his teeth.
Raonic is hoping new coach Carlos Moya can help him manage biting stress off court.
Video: See Tsonga Call for Crowd Control
The 13th-seeded Canadian did not confront a break point rolling past Lucas Pouille, 6-1, 6-4, 6-4, to advance to the Australian Open second round.
Afterward, Raonic said he believes his new coach can bring efficiency and a sense of calm to his game.
"I think he can help me in being more efficient with my game, using my game better, especially throughout certain situations," Raonic said. "I think he can also give me a lot of insight, on and off the court, especially around two-week tournaments, how I can be more efficient sometimes.
"I have an inability to sort of after matches are over to sort of switch off and relax completely. I think he can bring that calm to me. With the vast knowledge that he has, and he has great sort of sense of how to approach, how to talk to people, I think he can help me in those kind of different situations."
Raonic opened the season dethroning defending champion Roger Federer to win his eighth career title in Brisbane. Raonic's former coach, Ivan Ljubicic, now coaches Federer. The 2015 Australian Open quarterfinalist made the decision to hire Moya, whom he spent time with during the IPTL season, to join co-coach Riccardo Piatti.
"When the split happened with Ivan, the whole approach was there is no rush. Riccardo told me he was ready to take on more weeks if he needs to, and until the right choice and the choice that felt the most right was made," Raonic said. "So there was no rush. I got to know Carlos a little bit through IPTL. We spent some time there discussing what he sees in my tennis and how he sees it should be applied and make the steps forward that I want to make. And then it was decided and sort of put together just before the new year.
"I think I announced it maybe a day after the new year or two days after. That's sort of when we came to the understanding for the number of weeks and which role for him to play."
Photo credit: Brisbane International