Nick Kyrgios' first victory in the ATP Cup was a bittersweet moment. The Aussie was moved to tears as he talked abut the bushfires raging through Australia after he defeated Jan-Lennard Struff.

The world No. 30 kickstarted efforts to support the victims of the wildfire by pledging $200 for every he hits during upcoming tournaments. In his first match at the ATP Cup, Kyrgios raised $2,000 after slamming 20 aces.

"Obviously my hometown's Canberra and we've got the most toxic air in the world at the moment. It's pretty sad. It's tough," Kyrgios said.

Since the Aussie's initial pledge, many other players have jumped on the bandwagon, offering up donations per ace, including Alex de Minaur ($250), John Millman ($100), and Samantha Stosur ($200). Some players are donating money outright, such as Maria Sharapova, who is donating $25,000, and Ashleigh Barty, who will give her entire Brisbane prize money.

After Kyrgios's win against Struff, he didn't play his match against Canada due to a back injury, but Australia would still win, 3-0 and qualify for the quarterfinals. 

Hopefully, Kyrgios will be back sooner rather than later to keep slamming aces to save his home country.