Chelsea manager Mauricio Pochettino speaking to BBC Sport: "I think it was a very good game. I think we dominated more of the beginning, then in the second half, after 70 minutes, we start to drop our energy because we played three days ago, and of course that is a massive difference.
"When we were with the full energy we were the better side. Now we have to think about the replay and of course move on and try to recover the players for the next game.
"I am so happy with the performance of the whole team. I think the performance was good we just weren't clinical enough. For them to face a team like Aston Villa who are doing fantastic in the Premier League and are in the top four, I think it's a very good signal that we are improving.
"Of course we wanted to win. We were not clinical enough but we created chances and we need to keep believing."