Olympic champion Dayron Robles is likely to miss a highly-anticipated hurdles showdown this weekend because of a delay in obtaining a US visa, the Cuban's coach said on Wednesday.

The Diamond League meeting in Eugene, Oregon, would have been the first race of the 25-year-old's career in the US and was expected to be a preview of the 110m hurdles final at the London Olympics.

The delay in obtaining a visa for Robles and his Cuban teammates, however, was likely to scupper world record holder's participation, his coach said