Iga Swiatek earned the spotlight in 2020 after she won the French Open title and has been constantly evolving as a player since.
Swiatek rallied from a set down to advance to the French Open quarter-finals by beating Chinese teenager Qinwen Zheng 6-7(5), 6-0, 6-2 for her 32nd consecutive victory on Monday.
She took over the No 1 ranking from Ash Barty after the Australian announced her shock retirement in March.
On Tuesday, she celebrated her 21st birthday with a cake at the Roland Garros.
The Pole is on the longest unbeaten run in the women's tour since Serena Williams agged 34 victories in succession in 2013.
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