Andy Murray's uncle told Daybreak it was "a bit surreal" following the British No. 1's Wimbledon win.
Niall Erskine, whose sister Judy is Murray's mother, said the tennis ace was "absolutely exhausted" afterwards.
"He was shattered, and of course everybody wanted to offer their congratulations to him and have a word with him, and you could see he was running out of energy quickly!"
Andy Murray's grandparents said they were "surprisingly calm" as they watched his nail-biting Wimbledon final.
Roy and Shirley Erskine told Daybreak that because Murray was playing so well and was in control during the match "it was different".
His granddad added, "That was the calmest I've ever been watching Andy Murray play".
Murray's Wimbledon triumph has been lauded in today's newspapers, and many have been speculating that he will be awarded a knighthood. The Times dubbed him 'The History Boy' and produced a special wrap around edition of the paper to commemorate his win.
The Independent headline read simply 'Champion' and whilst its sports section read:
"It was an astonishing end to an astonishing day. Andy Murray secured his lifetime's ambition by winning a final game of nerve shredding drama yesterday that summed up an unforgettable Wimbledon final, full of stunning tennis and with more plot twists than an Alfred Hitchcock thriller."
Andy Murray's maternal grandparents Roy and Shirley Erskine were unable to travel to Wimbledon to watch his historic victory due to injury, so watched the match from their home in Dunblane. They said they were delighted by his win, and paid tribute to their daughter's efforts. Mr Erskine said:
"There was a dance done in the living room. We just thought it was great, wonderful. We're very proud and pleased for his sake but also for Judith, his mother. She has worked her socks off to help get him where he is."
Speaking to ITV News they said this was the first year they had not travelled to Wimbledon to see their grandson, and speculated to they may have been the "jinx."
This is the moment that fans in Andy Murray's home town of Dunblane saw their hero finally win the Wimbledon title.
Speaking about the new Wimbledon champion, First Minister of Scotland Alex Salmond said Andy Murray was a 'young man who deserves every bit of his success'.
Prime Minister David Cameron said Andy Murray's Wimbledon final win was 'fantastic' and congratulated him on his 'absolutely brilliant' performance.
Oh my God. What a match, what a player. Inspiring a Nation. .Andy Murray!! Ya Beauty.
Tatally drained. What an amazing match. #dontknowwhattodowithmyselfnow