Cassandra Tate (US) won in 55.16s and her compatriot, Georganne Moline, was second in 55.38s. Nel, who finished in 55.63s, was quite relieved that her racing season has come to an end.
“I would have loved to represent South Africa at the African Games in Brazzaville next week, but I think it would be foolish to do it.
"My Achilles heel has started to act up after last week’s Diamond League Meeting in Zurich and it again flared up last night. I think it would be foolhardy of me to keep on racing, especially considering the Olympic Games in Rio next year.
"The best I can do now is to ask the experts at the High Performance Centre (HPC) in Pretoria to find out what causes my injury. I am confident that they will be able to help me sort out the problem before I seriously start preparing for the Games.