Patrik Biel died following the collision in Rectory Hill, Amersham on Friday last week at about 6pm.
He had recently set up a football team at the Goals Soccer Centre in Victoria Road, Ruislip. They played a match in his honour on Bank Holiday Monday.
His brother, Tom, said: “When we played, we could feel his presence.”
Mr Biel was one of six brothers who lived in Devonshire Avenue in Amerhsam and he had gone to Berkhamsted Collegiate School. On Tuesday, Maurycy Paszkiewicz laid flowers and said a prayer at the scene with Tom Biel.
Mr Paszkiewicz said: “He was an unbelievably bright, enthusiastic person who enlightened us all with his presence. He will be missed.”
Patrik Biel was returning from work in Park Royal when he crashed. He was 10 minutes behind his brother, who were both due to attend the wedding of a family friend on Friday night.
Mr Paskiewicz, who had known Patrik since he was five, said: “The brothers were very close. It is incredible, devastating, shocking, and I am saddened at the age.”
Tom Biel, 22, said: “He was in his prime, he was about to make choices about what to do next.”
Flowers have been left at the scene. One note, from ‘Jess’, said: “Pat, you were an amazing person and helped everyone. I will forever cherish and treasure the last five years I’ve spent with you.”
Another, from ‘Emily’, said: “Patrik, you will never be forgotten. Thank you for all the love you showed everyone. I will try my best to look after everyone you care about.”
Another card said: “Rest in peace Pat, you will be missed.”
Mr Biel’s car left the road and collided with a tree and then was in collision with a grey Vauxhall Corsa.