- Substitutes Aaron Ramsey and Olivier Giroud each scored in the final seven minutes to hand Arsenal a win over the 2016 champions.
Despite conceding three goals against Leicester, goalkeeper Petr Cech on Saturday hailed Arsenal's "beautiful" come-from-behind 4-3 Premier League victory on Friday night.
"Seven goals, fantastic comebacks," the 35-year-old Czech said on his website.
"The season started with a beautiful game which met all expectations."
Arsenal opened the scoring in the second minute but the Foxes hit back to lead 2-1 and then 3-2 before the Gunners' spectacular comeback in the closing minutes.
"Once again, we had to come back and the team showed it was very well prepared because it could cope with the unpleasant situation," said Cech.
"We went for a win and we deservedly earned it."
Cech, who holds the Premier League record for clean sheets, admitted that conceding three goals at home was not "an ideal start".