Tributes, led by Britain's Prince William and Fifa president Gianni Infantino, have poured in from the footballing world and beyond for Leicester City owner Vichai Srivaddhanaprabha, who died in a helicopter crash on Saturday.
The billionaire, who also owned Thailand's King Power duty-free empire, was killed, along with four other people, when his helicopter crashed after he watched Leicester play in an English Premier League match at the club's King Power Stadium.
His wife Aimon and their children placed flowers outside Leicester City Football Club to mourn the death on Monday.
"The world has lost a great man," the club said in a statement.
"Leicester City was a family under his leadership. It is as a family that we will grieve his passing and maintain the pursuit of a vision for the club that is now his legacy," it said.
Leicester's match against Southampton in the League Cup today has been postponed, the club said.
Police named the four other victims as Nursara Suknamai, a former Miss Thai Universe runner-up, and Kaveporn Punpare, two members of Vichai's staff, pilot Eric Swaffer and passenger Izabela Roza Lechowicz.
Prince William offered his condolences to the families of Vichai and the other four victims.
William said his "thoughts today are with the family and friends of Vichai Srivaddhanaprabha and all the victims" in the helicopter, which went down next to the stadium.
The prince, who is the president of the English Football Association, said he had known the 60-year-old Vichai for several years.
William added that Vichai "made such a big contribution to football, not least through Leicester City's magical 2016 season that captured the imagination of the world.
"He will be missed by all fans of the sport and everyone lucky enough to have known him."
Leicester City under Vichai won their first English top-flight title that year although the Foxes were priced by bookmakers at 5,000-1 odds to achieve the feat before the season began.
Prince Abdul Mateen of Brunei tweeted: "Deepest condolences to the family and friends of a great man. A great competitor on the polo field and kind soul off of it."
Mr Infantino, chief of world football's governing body Fifa, also sent his condolences to the friends and families of Vichai and the four other victims.
In a Twitter post attributed to Mr Infantino, Fifa said it "extends its deepest sympathies to their families & friends & to the many football fans for whom Vichai was an integral member of The Foxes family".
Aleksander Ceferin, president of European football's governing body Uefa, said in a statement that "Uefa and European football is deeply saddened to hear of the tragic deaths of the owner of Leicester City, Vichai Srivaddhanaprabha, and the other four people who lost their lives".
The Football Association of Thailand and the Asian Football Confederation also extended their condolences to the victims.
Spanish giants Barcelona and Real Madrid both paid tributes to Vichai.
"The club wants to show their condolences to his family, his friends and all the Leicester fans," said European champions Madrid in a statement.
"Our thoughts are with the whole @lcfc family. Rest in peace," Barca posted on Twitter.
Leicester City said a book of condolence, which will be shared with the Srivaddhanaprabha family, will be opened at the King Power Stadium from 8am today for people wishing to pay their respects.
People can also pay their tribute at www.lcfc.com.
Vichai, who bought Leicester City in 2010, was a regular at matches who used to fly to and from home games.
The blue chopper took off from the middle of the pitch once the stadium had emptied after Saturday's 1-1 draw with West Ham.
Eyewitnesses said the helicopter appeared to develop a mechanical problem in its rear propeller shortly after takeoff.
Images showed orange balls of flame engulfing the wreckage in the car park of the stadium where just two years ago Leicester celebrated the most unlikely of Premier League title triumphs.
"Struggling to find the right words ... but to me you are legend, an incredible man who had the biggest heart, the soul of Leicester City Football Club," Leicester striker Jamie Vardy, one of the heroes of that success, posted on Instagram.
"Thank you for everything you did for me, my family and our club. I will truly miss you.... May you rest in peace... #theboss"
A minute's silence was observed before the whistle of Sunday's Premier League matches.
Football fans in Bangkok said Vichai had helped develop the sport in Thailand as well, bringing greater recognition through his involvement with Leicester City.
"He is an important person who has raised the bar of Thai football further," Apichart Jitratkavee, a Leicester fan in the Thai capital, said.
Chamat Uchukanokkul, 39, said Vichai was "an inspiration to Thais.... He showed that we can do anything if we set our minds to do it".