Derby County manager Wayne Rooney has been warned by the Football Association after saying he once wore boots with long studs "to injure someone".
Rooney's England team-mate John Terry suffered a foot injury in the game, which Chelsea won 3-0.
"For that game I changed them [studs] to big, long metal ones - the maximum length you could have," said Rooney.
The 36-year-old added: "I wanted to try and hurt someone, try and injure someone."
England's all-time leading goalscorer added that if there was a challenge there "I knew I'd want to go in for it properly, basically - I did, actually".