So close yet so far. In the past couple of months, Emma Raducanu has twice pushed the world's leading player to the brink.
On Friday, Raducanu has another chance to test herself against one of the very best, meeting 2022 Wimbledon champion Elena Rybakina for a spot in the US Open fourth round.
While the British number one ultimately fell short of beating Aryna Sabalenka at Wimbledon and the Cincinnati Open, 36th-ranked Raducanu's performances were a mark of her encouraging progress.
"When Raducanu has taken on top-10 players in previous years, it felt she was a little lightweight going up against the power players," former world number one Lindsay Davenport told BBC Sport.