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By Kathryn Robinson

On Twitter, she's the "Queen of Center Court."

Serena Williams won her fourth consecutive Grand Slam tournament on Saturday with a win at Wimbledon, also her 21st Grand Slam title in her illustrious career.

The 33-year-old tennis star took to Twitter to show she's already positioning herself for the next step — and possible tennis history.

"Serena" was trending worldwide after her victory, and celebrities, athletes and politicians were showing their support for the "Serena Slam."