Donald Young: Magical Run by American Tennis Phenom Will Continue vs Andy Murray

Not long ago, Donald Young was considered a bust—another player with the world at his fingertips that was going to let it all get away because of a bad attitude. And then something happened. Something that changed the perspective on his career and started to turn everything around.

He got Twittered.

Young was not awarded a Wild Card into the French Open by the UTSA and took to Twitter to voice his displeasure. A couple of four-letter words later, and he was in hot water with the organization that governs all things tennis in the United States.

Until that point, Young didn't understand you can't just spout off and not expect repercussions. He later apologized for his actions and it appeared to finally sink in. He wasn't going to be handed Wild Cards for the rest of his career, USTA poured plenty of resources into him and now he had to produce.

After bowing out in the first round at Wimbledon, Young returned home and had a solid US Open Series. He picked up wins over Jurgen Melzer and Marcos Baghdatis in the Legg Mason Tennis Classic and vaulted himself into position for automatic entry into the year's final major.

Nobody was sure what to expect from the 22-year-old lefty. The talent was always there, but he had a career record of 3-12 in majors.

While Young knocked off Lukas Lacko in his first match, it still didn't get much attention from the national media. The frenzy began after he knocked off Stanislas Wawrinka in the second round, thanks to a dominant performance in the fifth-set tiebreaker.

Now, the pressure was back on Young, just four months after his career had been hanging in the balance.

Unlike in the past when he failed to deliver, Young stepped up and defeated 24th-seed Juan Ignacio Chela.

Young played with an air of invincibility, ripping winners off both wings. He finally started to harness his natural lefty spin, using it as an approach shot before dropping home an easy volley. Chela had no answer for this new, confident Donald Young.

That confidence, which now lacks the negative aspect driven by an ego, is the main reason Young will knock off Andy Murray.

When Young fell behind two sets to one against Wawrinka, he looked toward his box. In the past, this would have been the time he lost it. Rackets would have feared for their lives as he lost control of his emotions.

It didn't happen this time. He just put his head back down and started mentally preparing himself for the next set. Ever since his Twitter scandal, Young has changed. And it's a change for the better.

Murray is a frustrating player to go up against. He gets back more shots than just about anybody else on tour and is in great shape. He's only been challenged once during his first three matches and it was against Robin Haase, a player similar to Young in that he uses a high-risk, high-reward approach.

If Young stays on the offensive, keeps attacking Murray's forehand and remains in a solid mental state, he can continue his magical run.

Either way, he's going to achieve a career-high ranking and his career is back on track.

Maybe Twitter is good for something after all.