Reigning champions Leicester City suffered a shock opening-day defeat to new boys Hull City.
The holders began their Premier League title defence with a 2-1 defeat in Saturday's early kick-off at the KC Stadium.
Claudio Ranieri's men looked a shadow of the team that was so unexpectedly crowned Premier League champions last season.
"It was the first game so there was always going to be a bit of rust on the players. We need to dust that off and come back better."
Leicester captain Wes Morgan competing with Hull City's Curtis Davies
Ranieri added: "Our effort was amazing but it was individual, not as a team and that is the key of the match."
The Foxes will need to rekindle the team spirit and work ethic that characterised last year's success.
Jamie Vardy - in many ways the embodiment of Leicester's rise from also-rans to Premier League champions - failed to capitalise on a few opportunities that onlookers couldn't help but feel he would have scored with ease last year.
Leicester fans were obviously unhappy with their team's performance and some took to social media to air their views, with many mourning the missing influence of N'Golo Kanté, whilst others were more considered in their approach and reaffirmed their belief that this weekend's defeat is just a blip.
@LCFC its only the beginning of the season it will change :D— Sheid Ferrari (@SheidFerrari) August 13, 2016
@LCFC well Claudio You can do something about it. We can't, but we need to see the team spirit back— Jonathan (@Jonathan_bc) August 13, 2016
@LCFC disorganised rabble today. With a case of lazy-itis. Embarrassing. Get off the beach, get back to work!— Vin Kelsey (@vckelsey6) August 13, 2016
@LCFC don't forget last season, it's only one game after a promotion preseason not a proper one, we'll come good— Stevie Smith (@LittleSmith1970) August 13, 2016
Ranieri has one week to try and bring about an improvement in his side before they host Arsenal at the King Power Stadium.