Spanish forward Perez put Leicester ahead nine minutes before the break with his fifth goal since swapping Newcastle for the King Power Stadium in the close-season.
Chelsea’s Marcus Alonso broke the deadlock for Frank Lampard’s side at Stamford Bridge against Newcastle for a 1-0 win while Youri Tielemans sealed a 2-1 victory for Leicester over Burnley at the King Power Stadium.
Thousands of supporters walked to the stadium from the city centre before the Premier League game, which was preceded by two minutes’ silence for club’s late owner Vichai Srivaddhanaprabha.
Vichai Srivaddhanaprabha was one of five killed in the crash near the King Power Stadium after Leicester City’s last home league match on Oct. 27 against West ham United.
Vichai and four other people died when his helicopter plummeted to the ground just outside the King Power Stadium following the game against West Ham last weekend.