Biarritz ensured hapless Viadana remained winless in Pool 4 of the Heineken Cup as they ran out 25-16 winners at the Parc des Sports Aguilera.

USA winger Takudzwa Ngwenya ran in two of the hosts' four tries, with Jacques Cronje and Manuel Carizza adding the other touchdowns and Marcelo Bosch kicking one conversion and a penalty.

Calvin Howarth was the star for the Italians, scoring one converted try and landing three conversions.

Biarritz (10) 25
Tries: Ngwenya (2), Cronje, Carizza
Con: Bosch
Pen: Bosch

Viadana (9) 16
Try: Howarth
Con: Pilat
Pen: Howarth (3)

Biarritz Olympique Pays Basque: B Thiery; T Ngwenya, A Masi, R Cabannes, J Gobelet; M Bosch, F Cibray; M Moala, B Noirot, E Coetzee, S Dellape, M Carizza, S Malonga, I Harinordoquy (capt), J Cronje.

Replacements: M Cortese, B Lecouls, A Creevy, S Betsen, J Dupuy, J Peyrelongue, I Bolakoro.

Viadana: H Reid; S Bortolussi, M Harvey, G Law, S Pace; C Howarth, C McGrath; M Alonso, A Moretti, I Rouyet, C Bezzi, Q Geldenhuys, J Sole (capt), A Birchall, J Erasmus.

Replacements: L Ferraro, L Milani, O Booyse, A Benatti, H Pedersen, C Pilat, C Spadaro.

Referee: Andrew Small (England)