Andre Agassi has a stunning admission in his upcoming autobiography. Agassi says that when his career went into a tailspin in 1997 he started to using the drug crystal meth.

ESPN writes:

He'd sunk to No. 141 in the world. He recalls that he was sitting at home when his assistant, Slim, introduced him to one of the most addictive substances known to man:

Slim says, You want to get high with me?

On what?

Gack.

What the hell's gack?

Crystal meth.

Why do they call it gack?

Because that's the sound you make when you're high. Make you feel like Superman, dude.

As if they're coming out of someone else's mouth, I hear these words: You know what? F*** it. Yeah. Let's get high.

Justine Henin, who was ranked the world's No. 1 player last year, is set to announce a return to women's professional tennis later today. Back in May she complained about how the sport left her with various physical ailments, and noted that she did not think a return was possible. In the past month she began to train again, but hasn't commented on plans of a return to the sport.

Henin, 27, is expected to make a formal announcement Tuesday afternoon, and is likely to be ready for the first major of next season.

Roger Federer is being fined $1,500 for audible profanity during CBS's live broadcast of the US Open final. Microphones picked up Federer's exchange with the chair umpire.

Two other players are also being fined for using profanity during the tournament - Vera Zvonareva and Daniel Koellerer. A total of $31,500 is being collected by the tournament. Serena Williams was fined $10,000 for unsportsmanlike conduct and $500 for racket abuse, and Daniel Nestor was charged $5,000 for unsportsmanlike conduct toward a fan.

A profanity-laced tirade by Serena Williams directed at a US Open Line judge on Saturday evening cost the tennis star not just the match, but also a chance at making it to the finals and a $10,000 fine. An investigation is also under way to determine if there should be additional punishment. On Sunday she issued a statement to the press, and on Monday she posted her apologies on both Twitter and her blog.

On Twiter, Serena wrote:

"I want to sincerely apologize FIRST to the lines woman, Kim Clijsterst, USTA & mostly tennis fans everywhere. Thank you all for your support."

She posted a lengthier apology on her blog:

"Hey guys!!!

I want to amend my press statement of yesterday, and want to make it clear as possible - I want to sincerely apologize FIRST to the lines woman, the USTA, and mostly tennis fans everywhere for my inappropriate outburst. I'm a woman of great pride, faith and integrity, and I admit when I'm wrong.

I need to make it clear to all young people that I handled myself inappropriately and it's not the way to act — win or lose, good call or bad call in any sport, in any manner.

Roger Federer shared pictures of his newborn twin girls today on Facebook. The tennis legend wrote on his page:

As promised, here is a family picture that my dad took. He thinks he's becoming a professional photographer. It was very funny as both girls had the hiccups while we were trying to take a decent picture. The girls and mom are doing great. Thanks for all your warm wishes.

The 2009 Wimbledon champ and his wife Mirka named the babies who born late last month Myla and Charlene.

Tennis star Roger Federer had a special update for his many fans on Facebook. The tennis legend wrote:

Mirka, Myla and Charlene are all doing really well. The baby girls are doing new things every day and are a lot of fun. Hopefully, before the end of this week, I will charge my camera and have my Dad or someone take some pictures so I can share one with you. Thanks for the support and warm wishes.

This time, the little sister came out on top. Serena Williams bested sister Venus in straight sets, thwarting her older sister's chance to win the prestigious title for a fifth time. This was Serena's first championship on the famed grass courts in England since besting her sister in 2003, and avenging last year's straight set loss.

Serena took the first set in a tiebreaker, but the second set was never in doubt. The younger Williams sister's serve was too much to handle, and she was able to break early and rolled 6-2 in for the straight set win.

Tennis Legend Roger Federer asked his fans on Facebook to ask him some questions and picked three questions to answer from them. The 27 broached the subjects the Wimbledon roof, when he plans to call it quits from tennis, and offerded advice to the next generation of tennis players. You can follow Federer on Facebook by following this link.

Here is what he had to say in the exchange with fans.

When do you plan to retire from tennis?

When I stop playing tennis, which I hope will not be for a very long time, I plan to dedicate a lot of time to my foundation. I will also get involved with some businesses I enjoy and try to continue to give back to tennis. I will also try to catch up with my family and friends that I don’t get to see very often and I will make sure I am a great Dad and husband.

But, I don’t like to think about life after tennis as I am enjoying the sport so much now and don’t see stopping anytime soon.

How do you feel about the new Centre Court roof?