During the 2011–12 season, Guardiola made increasing use of the 3–4–3 system, especially when facing two attackers, using Cesc Fàbregas as an attacking midfielder and Sergio Busquets as a midfield pivot. Johan Cruyff previously had used this system as a basic tactical approach when Guardiola played for Barcelona. Guardiola employed this system in a 5–0 win against Villarreal with Javier Mascherano, Sergio Busquets and Eric Abidal as the back-three and Seydou Keita acting as a defensive midfield. Of note is that throughout their careers, Mascherano, Keita and Busquets had been deployed primarily as midfielders and Abidal as a full back, meaning Guardiola did not play even one central defender in the 5–0 victory. This he repeated four years later in Bayern Munich's 3–0 victory over Bayer Leverkusen, when he fielded a back three consisting of David Alaba, Philipp Lahm and Xabi Alonso. Although there are some spectators who assume the primary reason for the 3–4–3 was because he was short on defenders, in a later Champions League match against Milan at the Camp Nou, he employed this tactic with most of his players available for selection. As manager of Bayern Munich, he also employed a 3–4–3 formation during the first leg of the Champions League semifinal against old club Barça.