Leicester City midfielder James Maddison says his side was prepared to attack Chelsea's weaknesses.
The Foxes outwitted Frank Lampard's Blues in the Premier League on Wednesday, winning 2-0 at home.
Wilfried Ndidi scored the game's opening goal after Leicester utilised a short-corner.
"We worked on it," Maddison told Sky Sports of the opening goal. "We looked at Chelsea with little short corners and being creative.
"We [saw] they switch off sometimes from set pieces and we knew that was something we could pick on.
"We haven't scored enough goals from set pieces.
"I'm pulling my hair out sometimes as the corner taker! You look at the stats that come up, it says 'goals scored from set pieces, Leicester City bottom of the table', so it's really nice to see one come off. A bit of a relief, actually!"