Naomi Osaka digs deep to win US Open title

Naomi Osaka won her third grand slam title in New York (Seth Wenig/AP)

Naomi Osaka staged a brilliant comeback to defeat Victoria Azarenka and win her third grand slam title at the US Open.

Azarenka picked up where she left off in her semi-final victory over Serena Williams and swept through the first set in just 27 minutes.