"Severus.. please.." croaked Dumbledore, as he barely returned another one of Snape's powerful shots. They were on the tennis court in the Astronomy tower at Ballcourts, and Dumbledore was losing. Bam! Another shot. This time, he lobbed it high, waiting for Snape to finish the job. Harry, at the moment, was so stunned by Snape's skills that he was frozen in place, unable to move until the match was over. He watched silently, until Dumbledore tripped over his long robes, and fell. Snape's eyes glistened with hatred, and waited for the ball to drop, and then,
"AVADA KEDAVRA"! The cursed phrase had been uttered.
He slammed the ball downwards towards Dumbledore. Harry tried to shout but couldn't, still petrified. The Avada Kedavra was an illegal shot, much to evil and twisted to be used on a tennis court! Nobody had ever returned it. Except for Harry. The ball lunged at Dumbledore, and found its target. A sickening crunch was heard as all the bones in Dumbledore's torso snapped. He rolled over.. what thrice? Five times, perhaps? A single tear slid down Harry's cheek, as his master, coach, teacher, was no more. And he lost it. The spell was broken, and he sprinted as fast as he could towards Snape, only wanting revenge, to murder and torture, and he shouted into the night,
"HE TRUSTED YOU, SNAPE! HOW COULD YOU! PLAY ME NOW!"
Snape, to simply say, was shocked. "Come on Avery, let's go," he muttered. They changed into tennis balls, floating gracefully in an arc onto the ground seventy feet below, where they bounced several times and transformed back into themselves. But this was a pitiful obstacle for Harry. He changed into a ball as well, since Voldemort's powers were transferred into him, and followed after Snape. "Get away, Potter!" spat Snape. In return, Harry hit a forehand as hard as he could, but it missed by several feet. He served at Snape, but the ball was hit back and struck Harry in the balls.
"LEVICOR-"
"NO, POTTER! HAHAHA!" That meant that Harry only had one choice. The twist serve that he had learned from the Half-blood Prince of Tennis.
"SECTUMSEMPRA!" Harry shouted. Snape couldn't hit this one back could he? After all, only he knew. But he was wrong, and he learned the hard way. Snape lazily deflected it back and it broke Harry's glasses.
"Don't dare use such shots on me, Potter! It was I who invented that shot! I, the Half-Blood Prince of Tennis!"
"Stay here and play, you coward!" Yelled Harry.
"DON'T! CALL! ME! A! COWARD!" Screamed Snape, and he lobbed it so hard that the ball landed back on top of the Astronomy tower. It bounced back quickly and knocked poor Harry down, giving him a concussion. Dumbledore had died, Snape had escaped, and Ballcourts was no longer safe.

Finn