To My Dear Friend is the 171th episode of the original Prince of Tennis. It originally aired on the 9th February 2005.
Momoshiro is still angry with Ryoma. Meanwhile, Ryoma is moping and having conflicting feelings about going to the U.S. Open. Eventually, the two make up and play a friendly match. Even though Ryoma wins, Momoshiro technically wins for the block. However, Momoshiro urges Ryoma to take the opportunity and go to the U.S. Open. Finally having made up his mind, Ryoma decides to accept the offer.