Manchester City boss Manuel Pellegrini is unimpressed by Manchester United's revival.

City go to Old Trafford tomorrow.

"United bought a lot of very good players such as Angel di Maria, Radamel Falcao, Ander Herrera, Juan Mata and Daley Blind.

"For me, the strange thing was why they didn't do it before, earlier in the season.

"But it's not a surprise how they are playing in this moment."