Israeli-raised tennis player Aslan Karatsev reached the semi-finals of the Australian Open in his first Grand Slam tennis tournament. He eventually lost to tournament winner Novak Djokovic, but his ranking soared to world number 42 (from 253) and he also won $850,000.

https://www.timesofisrael.com/life-will-never-be-the-same-for-ex-israeli-tennis-star-who-lost-to-world-no-1/

https://www.jta.org/2021/02/16/sports/russian-israeli-tennis-player-aslan-karatsev-makes-history-at-the-australian-open