Chelsea boss Antonio Conte was delighted with Victor Moses' performance at wing-back for victory over Hull City.
The Nigeria international shone in the new system deployed by Conte at the KCOM.
"Moses played an incredible game in defensive and offensive situations," Conte said. "It is fantastic because he is working very hard. He deserved to play and he showed me that my choice was right.
"Pedro can also play in the same way to give you the opportunity to exploit one-v-one.
"Alonso played in this role at Fiorentina. This was his first Premier League start, but in the same way as the other players he must work. He played a good game but he can improve."