Australian tennis stars show support for bushfire victims

    Australia's Nick Kyrgios practices ahead of the ATP Cup in Brisbane.

    (CNN)Australian tennis stars are supporting victims of Australia's bushfires by donating money for every ace they hit at upcoming tournaments.

    Nick Kyrgios made the initial pledge of $200 (140 USD) for each ace on Thursday, before Alex de Minaur, who will star alongside the world No. 30 at the upcoming ATP Cup, replied with his own offer.
    "I like this I will go $250 (175 USD) per ace, just because I don't think I'll be hitting as many aces as you mate," de Minaur wrote on Twitter.
      Their teammate John Millman also chipped in: "I'm not at your level boys but I want to get involved," he wrote. "$100 (70 USD) for an ace over the Australian summer. #servingupsomehelp"
      World No. 99 Samantha Stosur matched Kyrgios' offer of $200, urging people to "join me in any way you can."
      Kyrgios also saw his call for a charity tournament to raise funds for bushfire victims answered by Tennis Australia this week.
      "C'mon @TennisAustralia surely we can do a pre @AustralianOpen exho (exhibition) to raise funds for those affected by the fires?" he said on Wednesday.
      Kyrgios (right) will star for an Australian team featuring Alex de Minaur and captained by Lleyton Hewitt (left) at the ATP Cup.
      The governing body later responded by saying "stay tuned for an announcement soon @NickKyrgios. Great to have your support."
      The ATP Cup also followed Kyrgios' lead by agreeing to donate $100 for every ace at the tournament. It expects the overall donation to exceed $150,000 (105,000 USD).
      Australia's state of New South Wales, which hosts this week's inagural ATP Cup event,