Ekram Haque was attacked as he returned from a mosque
The family of a pensioner killed as his granddaughter looked on have told of their "devastation" at his loss.
Ekram Haque, 65, a retired care worker, was attacked on 31 August in Church Lane, Tooting, as he left a mosque.
His son Arfan Haque said his father was a "gentle giant" and added he was very close to his granddaughter, aged five.
Two boys aged 14 and a 15-year-old have been charged with murder. All three are due to appear at Sutton Youth Court on 6 October.
Mr Haque said: "He was like a brother to me sometimes - my best friend, just such a loving individual.
"I am so devastated. I had so much respect for him."
Mr Haque's son said he was 'such a loving individual'
The grieving son said of his daughter's relationship with her grandfather: "They were very connected - virtually he was my childminder. They adored each other."
Mr Haque spent a week in a south London hospital before dying of his injuries.
The two 14-year-olds and the 15-year-old face an additional charge of attempted grievous bodily harm on two other pensioners, a man and a woman, on 26 August in Tooting.
Another boy, aged 12, has been charged with conspiracy to commit GBH in connection with the alleged attacks on two men, one in his 40s and the other in his 70s, in Church Lane.