It was Henrietta Knight who first identified I Am Maximus’ star quality and she is now backing the Randox Grand National hero to go on and win a Cheltenham Gold Cup.

The Gold Cup-winning trainer was in her role as racing manager to the late Michael Grech when she first laid eyes on I Am Maximus as a yearling and it was a clear case of love at first sight for Knight, who relished every moment of the Willie Mullins-trained eight-year-old’s Aintree triumph.

The 77-year-old now feels course winner I Am Maximus has all the capabilities to emulate her own Best Mate and capture the blue riband at the Cheltenham Festival.

Knight said: “I think he could win a Gold Cup. I’m not sure how Willie will cope with all his horses for the Gold Cup and which one he would consider the best, but he is a real stayer, Maximus, and he likes Cheltenham – he loves the hill.

“I really enjoyed watching the National and after he jumped the first two fences I said ‘he’s loving it, he’s got the hang of it and loves these fences’.

“We were just watching him creeping and creeping and he made that one mistake at The Chair, where he rather caught Paul (Townend, jockey) by surprise and he had to call a cab, but then Paul was very good as he didn’t rush him.

“He just let him get his confidence again and on he went on the second circuit, I thought it was fantastic to watch.”

I Am Maximus spent his first few summers with Knight at her West Lockinge Farm in Wantage and after the early stages of his racing career were overseen by Nicky Henderson, he switched to Mullins, who Knight credits with helping the burgeoning talent fulfil his destiny of winning Grand Nationals.

“I had the horse here a lot for two summers and parts of winter as well and he won a bumper and a novice hurdle for Nicky Henderson,” continued Knight.

“Mike wanted to move all his horses to Ireland and it was my idea to move him to Willie’s. I doubt anyone else would have won a National with him and he has trained him so well.”

She added: “I felt sorry for Jody McGarvey not riding him because he has done a good job on him this year, but that is how it goes in racing and you have to have your stable jockey on your top horse. Paul’s riding fantastic and I would want him on board.”

The son of Authorized is the latest champion off the Tom Costello production line that had been the source of Knight’s very own great, Best Mate.

The Costellos have been Knight’s go-to family when searching for high-quality new stock and I Am Maximus was an instant hit with not just Knight herself, but the horse’s original owner, who sadly died before his former charge reached his peak.

“I picked him out as a yearling and then I went back and bought him for Mike Grech as a three-year-old from the Costellos, from whom I bought Best Mate. He came from a fantastic place and all my best horses have come from them, not just Best Mate, but Calgary Bay, Racing Demon and Somersby as well.

“They produce good horses and they bought him from France as a yearling. I always loved him.

“Mike adored the horse and he was named after his wife Maxine, it was his favourite horse. It was unfortunate he had to give up his racing interests and when that time came, Willie thought he was an ideal candidate for JP (McManus).”

Shifting to the left at his fences has always been a trademark of I Am Maximus’ chasing career, while he has always been regarded as a touch ‘quirky’ by those who have dealt with him on the racecourse.

However, Knight – a known master on the schooling grounds – has nothing but praise for his jumping ability and explains how he always had the hallmarks of an exceptional staying chaser in the making.

“Most of the best horses are a little quirky and he has a little bit of his own ideas,” she said.

“He’s very straightforward to train but he has his own ideas about jumping. He was always a very, very good jumper and a careful jumper, but he just likes to measure his jumps up by going left-handed.

“In the Olympics, you will see the high jumpers go off sideways to measure the jump and it is what I Am Maximus has always done. That’s his mark and how he likes to do it.”

She went on: “He was always destined to be a chaser and he was unbelievable when he was here as a youngster – we would jump him a lot. He doesn’t want to fall, he always wants to get it right and that means he sometimes takes some rather strange jumps that catch the jockeys by surprise.

“I have some fantastic pictures of Maximus jumping all kinds of poles and everything else here, he could showjump, he is that careful, and he has got the time to be careful over staying trips. He’s good at conserving his energy and he doesn’t waste any in a race.

“He’s a very good horse and he would have gone round again in the National!”

There were no fallers in this year’s Grand National, as 21 of the 32-strong field completed the marathon course.

That is the highest number of finishers since 2005 and with the first four home all previous Grade One winners, Knight concedes the race is a far different proposition to the test her late husband Terry Biddlecombe would have encountered as a jockey, but a change that is necessary to adapt with the times.

“The first four home were all class horses and it just shows that cream comes to the top in races like that now,” explained Knight.

“It’s no longer a race where you will get a huge outsider from the bottom of the weights crop up, I don’t think. They skipped round a lot of the horses yesterday, they all looked fresh and everything looked good.

“The only thing is I think on the second circuit there is hardly anything to jump at as they’ve kicked all the top off – I think you could canter round on your pony and jump those. They are not what they were, but that is what the sport is now and people want to see a race without accidents.

“It’s just adapting to the times and it’s not like the brave riders of old who hunted round sitting on the back of their saddles on a long rein, with pot luck and huge fences. It’s more of a professional race now.”