The Welsh 400m hurdles ace returns to the Olympic scene a year since London 2012. He's expected to take to the track around 3pm this afternoon.
Welsh athlete Rhys Williams has come second in the 400m hurdles at the Birmingham Grand Prix this afternoon. He finished strongly in a time of 48.93 seconds.
However, there was disappointment in the same race for Llanelli's Dai Greene who finished fifth in a field of eight competitors. Greene has recently been recovering from a double hernia operation.