Ulster head coach Les Kiss believes Saracens are the greatest threat to Toulon’s reign as European champions.

Ulster’s assistant coach Allen Clarke believes last week’s postponement of the Champions Cup opener in Oyonnax will not compromise the side’s psyche in the lead up to Friday’s big clash with Premiership leaders Saracens at the Kingspan Stadium.

Ulster coach Mark Anscombe is convinced the full house at the refurbished Ravenhill will have a key role to play in Saturday’s Heineken Cup quarter-final against Saracens.

Ulster have fallen by eight points to Saracens in their Heineken Cup Pool 4 clash.