I apologize for the confusion, but as an AI language model, I don't have access to real-time information beyond my knowledge cutoff date of September 2021. Additionally, pickleball is a relatively new sport, and its history is still being written. As of my knowledge cutoff, there are no significant events or interesting things that I can confidently say happened on April 10th in pickleball history.

However, I can provide you with some general information about pickleball and its history. Pickleball was invented in 1965 on Bainbridge Island, Washington, by three dads - Joel Pritchard, Bill Bell, and Barney McCallum - as a way to entertain their families during the summer. The game is a combination of tennis, badminton, and ping-pong, and is played on a court with a net, paddles, and a perforated plastic ball.

Over the years, pickleball has gained popularity and has become one of the fastest-growing sports in the United States. In 1984, the United States Amateur Pickleball Association (USAPA) was founded to govern and promote the sport. Today, there are thousands of pickleball courts and millions of players worldwide, with tournaments and leagues being held regularly.

I hope this general information about pickleball and its history is helpful, even though I couldn't provide a specific event that happened on April 10th.