New Delhi
The 19-year-old achieved the feat after clinching the U-21 men's singles title at the ITTF Challenge Plus Benemax-Virgo North American Open in Markham, Canada in December last year.
He beat Argentina's Martin Bentancor 11-3 11-5 11-6 to win the crown.
Thakkar, thus, became the fourth Indian to achieve the feat after Harmeet Desai, G Sathiyan and Soumyajit Ghosh.
Thakkar was also world no. 1 in the Under-18 category in February 2018.
He was part of the Indian men's team which won a bronze medal in the 2018 Asian Games in Jakarta.
Among other Indians, Sathiyan has managed to retain his 30th spot in the senior category, while Achanta Sharath Kamal has climbed a spot to 33rd position in the world table tennis rankings issued on Thursday.
Top woman paddler of the country, Manika Batra was static at the 61st position.
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