Security films of the weighingin area are being scrutinised at Sha Tin following the shock 45 to 1 win of British import Monza in Hong Kong last Friday.

Monza was set to carry 8st 3lb in the Hong Kong race but rider Stanley Chin weighed-in at over 8st 5lb at the lunar New Year meeting.

Chief stipendiary steward, Clinton Pitts, has ordered an inquiry, but the horse is no danger of losing the race.

Johnny Murtagh, with two Hong Kong winners to his credit, rides Space Rock in an extended mile handicap on the Happy Valley tonight. Simon Dow's Rainbow Rain (Sebastien Maillot) faces a tough task in the 6,566 Prix William Alexanre Ruinat (1m 5f) at Cagnes-sur-Mer today. Twice unplaced at the Riviera venue this year, Rainbow Rain is unlikely to cope with the likes of Gonzaga, Trait de Genie and Sacrament.