Tennis: Victoria Azarenka Takes Out Defending Champion Kim Clijsters in Miami

In the blink of an eye on Wednesday night, No. 8 seed Victoria Azarenka upsets World No. 2 and Miami's defending champion Kim Clijsters in two sets 6-3, 6-3.

She will face Vera Zvonareva in the semifinals at the Sony Ericsson Open.

What is the biggest victory of her career so far, she says, "So far, yes."

Kim Clijsters appeared tired, particularly playing a marathon match against Ana Ivanovic the day before and had 44 unforced errors.

Vika won six of eight break points and could have had the benefit of a full day's rest. 

Clijsters said her shoulder was not bothering her but added that she was tired:

"Yeah, physically maybe. Tough few last days. But not in a way that I should not be ready for that. I train hard enough to physically be capable of doing that. Mentally just kind of feel like I didn't have any fighting spirit.

"You know, it's obviously tough against someone like her. You know, against some lower ranked players maybe it's possible to get through matches, but against somebody like her, not."

Azarenka has a losing record to Zvonareva, 2-8, but as Djokovic has showed us—confidence and cool head goes a long way.

Azarenka also won the tournament two years ago.

When being asked about what has changed in her game considering she has lost four out of five matches versus Clijsters, Vika answered:

"Well, I think I played a little bit more aggressive, played more forward, tried to come in more. That was the biggest difference. And physically I was much more stable today."

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