Ospreys coach Lyn Jones:
"It wasn't our greatest performance and these games can be quite hard. We had to raise the fellows and it was nothing more than a sound performance.
"In the first half we were a little lateral but we got our focus a bit more in the second half.
"It is one of those performances we need to put a line under and forget about. We got what we wanted out of the game and we have to move on.
"I wasn't getting twitchy about the bonus point and we are happy with the four tries, but I guess everybody was expecting 50-plus points.
"At this stage we usually talk about other teams losing to help our cause, but this season we are talking about beating Stade Francais at home and setting up the final weekend (at Sale).
"All we can do is put in a good performance against Stade as we did last year."
Ospreys: L Byrne; N Walker, A Bishop, J Hook, S Williams; G Henson, J Marshall; D Jones (capt), H Bennett, A Jones, A Wyn Jones, I Evans, J Thomas, S Tandy, R Jones. Replacements: B Williams, C Griffiths, B Cockbain, A Lloyd, M Roberts, S Connor, J Vaughton.
Calvisano: M Cagnoni; M Pratichetti, C Zanoletti, J Downey, W Spragg; R De Marigny, P Patelli; A Vigne Donati, L Ghiraldini, R Moore, M Ngauamo, V Bernabo, M Zaffiri, A Persico, D Dal Maso.
Replacements: S Silva, G Intoppa, B Gissing, N Cattina, P Griffen, D Pastormerlo, M Gallinetti.