Cech needed surgery for a depressed fracture of the skull

Chelsea wrote to the FA after the incident that saw keeper Petr Cech suffer a serious head injury.

An FA spokesman said: "We have received a letter and will respond in due course to address their concerns."

A Premier League spokesman added: "We will ask Reading for their observations and the issue will be discussed in due course by the board."

Chelsea manager Jose Mourinho was unhappy with the time it took the ambulance to reach the Madejski Stadium to deal with Cech.

The Czech keeper fractured his skull in a clash with Reading winger Stephen Hunt.

The Blues' letter also included their comments about Hunt's challenge on Cech, but this is unlikely to persuade the FA's disciplinary chiefs to take action against the Reading winger.

A Chelsea statement said it had written to the governing body with regards to "the serious and legitimate questions regarding medical procedures that we have following the injuries to Petr Cech and Carlo Cudicini".

It added: "Chelsea Football Club can confirm that we have written letters to the Premier League and the Football Association regarding a number of observations that arose from the match at Reading.

"Chelsea FC want to stress that we have not prejudged the outcome of these issues.

"But we do believe they warrant further investigation, not just in terms of what happened at Reading, but also to prevent the same questions being raised if similar incidents occur in the future."

The FA confirmed last week that there would be no formal action taken against Hunt because referee Mike Riley dealt with the incident at the time.

However discussions will be held with the FA and the Premier League about the medical regulations in place at top-flight football matches.

Chelsea believe important lessons can be learnt from the experience, which will offer quicker treatment in future for players who suffer serious injuries on the pitch.