Improve your game and have serious fun at Nike Tennis Camps. The Nike Tennis Camp at Sea Colony Beach Resort in Bethany Beach is located in one of Delaware’s premier family beach and tennis resort communities! It ranks among the top junior tennis camps in the region, offering a combination of fun, friendship, and skill development. This Day Camp offers junior players ages 10-18, of all skill levels, the chance to receive high level tennis training, sharpen their technique, and challenge themselves alongside their peers.