Jason Day's mother says eight of the Australian golfer's relatives died in Typhoon Haiyan in the Philippines, including his grandmother.
Day's mother, Dening, told the Gold Coast Bulletin on Monday that the player's uncle and six cousins also died in the typhoon, which has killed nearly 4,000 people and left more than a thousand missing.
Day is teaming with Adam Scott to represent Australia in the World Cup of Golf, starting Thursday at Royal Melbourne.
Day's mother, who migrated from the Philippines to Australia 30 years ago, told the newspaper "my daughter has been updating him, but I don't want to bother him because he has commitments."
She said many of her family members lived in the area around Tacloban, the capital of hardest-hit Leyte province.