Unai Emery insists there are no good relations between Aston Villa and Chelsea

Unai Emery has insisted that there are no "good relations" between Chelsea and Aston Villa after a series of transfers between the clubs.

On Sunday Argentina goalkeeper Emiliano Martinez joined Chelsea from Villa, completing the eighth deal between them in the past four years.

Martinez's move to Chelsea comes after Nicolas Jackson's transfer the other way last week.

No two Premier League clubs have exchanged more players, on permanent or loan deals, in the past four years.

But Villa boss Emery said the relationship between the two clubs is "only through the deals for money".

"Good relations?" he said. "They want to kill us and we want to kill them!

"We have good players and we can sign one player off them, it's not a good relationship - it's a deal for money and a deal for players.

"I am happy for Emiliano Martinez and Morgan Rogers and I know I am not happy for Chelsea."

A series of deals betwen the clubs began after Chelsea's owners, BlueCo, took control of the club in 2022 and signed Carney Chukwuemeka from Villa for £20m that summer. Ian Maatsen (£37.5m, to Villa), Omari Kellyman (£19m, to Chelsea) and Axel Disasi (a £5m loan deal, to Villa) subsequently moved between the clubs.

This summer alone has brought four more deals. Morgan Rogers completed a £117m move Chelsea, while Alejandro Garnacho joined Villa on loan with a conditional obligation to buy in a deal worth around £43m.

Jackson then moved to Villa for £65m, before Martinez followed.

Since 2022, Chelsea have paid Aston Villa £163.5m for players. Villa have spent £102.5m on Chelsea players including Axel Disasi's loan fee. That figure could rise to £150.5m should certain criteria be met to make Garnacho's loan move permanent. Chelsea believe the terms are easily reachable.

There are broader reasons why domestic transfers remain attractive, but money is often the biggest factor.

Premier League clubs generally have greater spending power than most teams elsewhere in Europe, meaning another English side may be among the few buyers capable of meeting the fee and wage demands of a selling club.

That can make domestic deals particularly attractive when clubs are trying to move on high-value players. Signing from within the league also reduces some of the uncertainty, with recruitment teams already familiar with a player's qualities and performances.

Yet even in a league where domestic trading is commonplace, the frequency of deals between Villa and Chelsea stands out.