Hot Shots Tennis is coming out on the PS4 via PS2 Classics line on the PSN Storefront soon. Gematsu has a full press release regarding the announcement below.

It’s Tennis, Hot Shots Style!!
Finally, a Tennis game for everyone! Filled with classic Hot Shots personality and true tennis gameplay, Hot Shots Tennis delivers an experience both amateurs and pros can enjoy! Play a quirky cast of tennis pros then challenge friends and family in singles or even four-player doubles matches.
The sport of Tennis will never be the same.

• Explosive Tennis Action! – Designed for easy pick up and play and longer rallies!
• 14 Hot Shots Choose! – Play with 14 colorful characters with crazy personalities and tennis skills!
• Master Exotic Courts! – Play 11 different courts including a Hawaiian beach, Old West town, Greek ruins and more!
• Unlockables! – Discover different costumes, courts, and more as you progress further in the game!!

Various Game Modes Offer Something for Everyone!!

• Training Mode – Perfect your tennis skills! Learn to position yourself, hit a the perfect serve, volley at the net, and lay down a powerful overhead smash!
• Challenge Mode – Work your way up seven classes of difficulty to become the ultimate Hot Shot!
• Tennis with Everybody – Play head to head with a friend for an intense singles match or play doubles with up to four players (multi-tap required).

Source: Gematsu VIA PlayStation Blog