There have been 10 games (8 Liga, 2 CL) where Messi, Villa, and Pedro all started; Barcelona has won all of them and scored a sum of 39 goals, with at least 2 in each match. Even if you remove the 8-0 Almeria win, it comes to 3.4 goals a game. Hopefully, in the knockout stages of the CL, Pep won't get cold feet and start an extra midfielder for security.