Head, who stood behind Maria Sharapova during the Russian star's doping ban, deemed the Australian's behaviour unacceptable.
Head, who stood behind Maria Sharapova during the Russian star's doping ban, deemed the Australian's behaviour unacceptable and have severed their ties.
"We were extremely disappointed with the statements made at Wimbledon by one of our sponsored athletes, Bernard Tomic," read a statement on the Head website.
"His opinions in no way reflect our own attitude for tennis, our passion, professionalism and respect for the game. Therefore, we have decided to discontinue our collaboration with Bernard Tomic."
Tomic gave a lethargic performance in his straight sets defeat against Mischa Zverev in the first round on Tuesday and then claimed he had been "bored" during the match.
In an astonishingly frank press conference, Tomic also admitted he called for the trainer even though he was not injured to try to disrupt his opponent's momentum.
The International Tennis Federation responded by taking a significant chunk of the world number 59's £35,000 earnings from the tournament.
The 24-year-old's level of effort has frequently been called into question, and he said on Tuesday: "I couldn't care less if I make a fourth round at the US Open or I lose first round.
"To me, everything is the same. I'm going to play another 10 years, and I know after my career I won't have to work again."