Olympic swimming champions Michael Phelps and Missy Franklin are scheduled to compete at a Pro Swim Series meet in Santa Clara on June 18-21.
According to NBC Sports, the competition is the "top swim meet between now and August's World Championships" for Phelps, a 22-time Olympic medalist, and Franklin, a four-time 2012 Olympic champion.
The meet takes place at the George F. Haines International Swim Center in Santa Clara.
Spectator tickets for preliminary and final events range from $5-15, while an all-session pass costs $35.
NBC Sports noted that neither Phelps nor Franklin are likely to swim on opening day.