Britain's Emma Raducanu was knocked out of the US Open as she was beaten ruthlessly by fellow Grand Slam champion Elena Rybakina in the third round.
Raducanu, 22, was aiming for a statement win over an elite player to underline her recent progress, but found herself outclassed in 6-1 6-2 defeat.
Ninth seed Rybakina pummelled Raducanu's serve, returning with devastating effect to break four times.
Raducanu's slow start on her serve - broken at the first attempt in the match after falling 0-40 down - set the tone for what followed.
After quickly falling behind, the world number 36 looked devoid of belief and struggled to get into the rallies.