Christine Ohuruogu delighted the home crowd in this afternoon's Diamond League event in Birmingham by winning the women's 400m event.

The 30-year-old world champion crossed the line in 51.40s to edge out American duo Joanna Atkins [51.53s] and Jessica Beard [51.63s].

Ohuruogu's compatriot Kelly Massey ran a new personal best of 51.96s in finishing fifth.

"I wasn't expecting that," Ohuruogu told reporters afterwards. "I was running down the home straight and saw that I was winning.

"It's good for the crowd to see that. The time wasn't all that great but it doesn't really matter."

Ohuruogo will defend her world title a year from now in Beijing.