Christo Lamprecht leaves mentor Louis Oosthuizen in shade as he enjoys dream major debut

The towering South African looked as cool as a cucumber around the sunny Royal Liverpool links with seven birdies and only a couple of dropped shots in a five-under round of 66.

Oosthuizen, a surprise winner at St Andrews in 2010, has helped his compatriot Lamprecht since he was a teenager through his Louis57 Foundation and while he struggled with a round of 74, he took great pride in his young apprentice.

Lamprecht, who at 6ft 8ins is one of the tallest players ever to play the Open, gazed at the leaderboard on the 18th green, then popped in a birdie putt to complete a superb morning's work.

"It's pretty surreal. It's nice to see a lot of work behind the scenes pay off. It's something I haven't dreamt of yet, but it's pretty cool," Lamprecht, who earned his spot by winning the Amateur Championship last month, told reporters.

Lamprecht said being paired with Oosthuizen, his favourite player growing up in the Western Cape and who has supported his golfing journey, was special.

"I think that helped a lot today," he said in an accent his friends tease him about for being too American, courtesy of studying Business Administration at Georgia Tech.

"I think having someone that I know very well and is a massive mentor for me and that I've played previously with kind of helped me feel a little more at home. It was kind of a nice draw. I thought they rigged it by some means! I loved it."

Oosthuizen joked that Lamprecht was already taller than him when he first encountered him as a 14-year-old.

"He's a great kid, he's very patient, he's got a game," Oosthuizen said. Asked if had ever been beaten by him, he added: "Not by eight shots I haven't."

While an amateur atop the early leaderboard was surprising, Lamprecht showed not a hint of imposter syndrome.

"As an amateur, yes, (it's surprising). But in my head, no, it's not. I'm very hard on myself, and I think I earned my spot to be here. I think the way I played today I earned to be on the top of the leaderboard," he said.

"It's not a cocky thing to say. I just personally think I believe in myself. Stepping on to the first tee box if you're a professional or a competitor, you should be believing that you should be the best standing there. I'm very proud of it."

Lamprecht's round-leading average driving distance of 325 yards helped take some of Hoylake's penal pot bunkers out of play and his tee shots dwarfed those of Oosthuizen.

Height, and long levers, clearly help but he said while bombing huge drives was 'fun' it was not so important.

"I can get it to like 340 carry but I don't want to. Not in this weather. Not in links golf. It's not what I think golf is all about," he said.

And while his physique clearly gives him an advantage, it has not always been like that.

"I was a little bit better than everyone at 14-15 years old and then I hit the growth spurt and everything golf-wise was everywhere," he said. "I was changing clubs every six months.

"I was growing so fast and my swing changed every week and it was all over the place for like two years."