Saman was widely hailed as a hero but the boys, aged 11 to 16, were only told about his death on Saturday after a medical team said they were strong enough mentally to handle the news, though many wept after hearing it. All 13 offered thanks for the support they've been given.
The boys appear seated on their hospital beds with their mouths and noses covered by white masks while each of their identification numbers appear on the walls above the beds.
The 12 boys and their soccer coach rescued after being trapped in a flooded cave in northern Thailand are recovering well and are eager to eat their favorite comfort foods after their expected discharge from a hospital next week.
Two British divers found them on July 2, squatting on a mound in a flooded chamber several kilometres inside the complex. But a rainy season downpour flooded the tunnels, trapping them.
Thai authorities are planning to turn the cave into a "living museum" while the idea of turning the rescue into movies has also been mooted.
"I am healthy", said Panumas Saengdee, 13.
Trump on Scottish golf course as he tees up Putin talks
For its part, Russian Federation said it was looking forward to the meeting. He said the presidents would meet one on one with just their interpreters.
But while the group is good health, they still face challenges.
"We need to prepare both the children and their families for the attention they will receive when they come out", Piyasakol said.
As the live game will be broadcast quite late on Sunday 15 July (at 22:00 Thai time), doctors said they will enjoy a recording later. Two boys who are part of the team but were not present for ill-fated hike told ABC News that going into the cave was a sort of rite of passage and team-building exercise.
Four days later, a former member of the Royal Thai Navy, Saman Gunan, 38, died in the cave after losing consciousness underwater during an overnight operation delivering extra air tanks.
They would like them to get a month of relaxation and recovery at home with family and friends - and do not want any of the boys or family members to conduct media interviews out of fear that it would cause them to feel guilt or shame.
Nineteen divers entered the cave complex during every rescue mission.
The 12 boys and their coach are resting in hospital after being rescued from a Thai cave.