Ash Barty knocked out of US Open after shock loss to Shelby Rogers

• Australian world No 1 collapses against unseeded American
• Rogers advances to fourth-round tie with Britain's Raducanu
• Ajla Tomljanovi loses in straight sets to Karolina Plikova

Ashleigh Barty, the world No 1 and defending Wimbledon champion, is out of the US Open after a 6-2, 1-6, 7-5 (5) defeat to unseeded Shelby Rogers of the United States in the third round.

Rogers, the world No 43 who had lost all five of her previous career meetings with Barty including four this year, trailed 5-2 and a double break in the third set before fighting back to force a tiebreaker amid a delirious Saturday night crowd at Arthur Ashe Stadium squarely behind the last American standing in the women's draw.