Emma Raducanu was aiming to reach the second week of the US Open for only the second time

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 a 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.