A guide to all the key events happening in Thursday night's Diamond League meeting in Rome World champion Dai Greene, who was narrowly beaten in Rabat on Sunday, opens his Diamond League account against a top-class field that includes Javier Coulson, L.J. van Zyl and Bershawn Jackson Men's high jump (7.30pm) Robbie Grabarz, one of the revelations of the indoor season and a possible medal contender in London, takes on a world-class line-up featuring American world champion Jesse Williams. Men's 100m (8.38pm) Usain Bolt cannot afford a repeat of his go-slow in Ostrava last week as he lines up against compatriot Asafa Powell and France's triple European champion, Christophe Lemaitre Women's 100m hurdles (8.51pm) Tiffany Porter will be hoping to continue her hot form in a race that includes world silver medallist Danielle Carruthers and Olympic champion Dawn Harper. Men's 4x100m relay (9.23pm) Dwain Chambers make his first ever appearance at a Diamond League meeting as he and his GB team-mates get in some crucial baton-passing practice in readiness for London.