Manchester City captain Kyle Walker is full of praise for Aston Villa boss Unai Emery's defensive work.
Walker rates Villa's high defensive line is the best in the country.
Villa beat Manchester City 1-0 at Villa Park back in December.
"Aston Villa probably do it the best, their high line is ridiculously high," Walker said on the Rio Ferdinand Presents Five YouTube channel.
"But it works for them and that's what their manager wants. There is risk and reward."
