Sceaux favourite to beat Gemix Un De Sceaux has been priced up as favourite when he renews rivalry with Gemix in Saturday's Prix Leon Rambaud at Auteuil. Willie Mullins' unbeaten gelding was given a clever front-running ride by Barry Geraghty but finished only a short head in front of the top domestic hurdler when they met in last month's Prix Hypothese over the same course and distance. He is now a kilo worse off at the weights in what is a comeback ride for Ruby Walsh, who dislocated a shoulder and sustained a fractured humerus in a fall in the Triumph Hurdle at the Cheltenham Festival. Paddy Power offer 8-11 Un De Sceaux against 2-1 Gemix, and spokesman Paddy Power said: "This won't be a stroll in the park for Un De Sceaux, who only just beat Gemix last time, but we don't really see any reason why the latter should turn the form around."