He doubled his tally on the stroke of half-time and converted the try to make it 27-0 to Saracens at the break.

Perelini helped himself to a hat-trick

Bordeaux finally put themselves on the board three minutes after the break through winger Sebastien Kuzbik's try.

Sebastien Laloo missed the conversion, but he chipped away at Sarries' lead with three penalties before Saracens had the final word.

Prop Luke Harbut was driven over for his first try for the club, and Smith inevitably added the points.

Sale rested several players against Roma, but were still far too strong for the Italians, with Samoan Apollo Perelini crossing three times.

Richard Wilks and Steve Hanley scored a brace of tries apiece for the Mancunians in their 93-0 victory.

But the gloss was taken off the pool four win, with props Les Bone and Stuart Tuner picking up injuries.

Gloucester's 34-15 win at home to La Rochelle in pool seven owed much to French fly half Ludovic Mercier.

He contributed 19 points in a game that saw four players, including three from La Rochelle, sent to the bin.

Also in pool seven, Caerphilly suffered a scare against GR.A.N Parma, trailing 17-15 to the Italians at the break before running out 41-30 winners.

Gareth Jones, Mark Workman and Luke Richards all crossed for second-half tries to spare Caerphilly's blushes.

Results:

Pool 1
Agen 20-9 Ebbw Vale
Rovigo 23-4 Montauban

Pool 2
Madrid 16-36 Colomiers
Pau 35-0 Petrarca

Pool 3
Beziers 23-12 Pontypridd
Overmach Parma 41-10 Leeds

Pool 4
Connacht 18-6 Narbonne
Sale 93-0 Roma

Pool 5
Bourgoin 28-34 Bristol
Neath 41-14 Viadana

Pool 6
Dax 22-29 London Irish
L'Aquila 25-14 Valladolid

Pool 7
Caerphilly 40-30 GR.A.N. Parma
Gloucester 34-15 La Rochelle

Pool 8
Bologna 17-49 Dynamo Bucharest
Saracens 34-14 Begles-Bordeaux