Filipino Miguel Tabuena is next best placed with a 67, on the par-73 Red Course at Royal Golf Dar Es Salam in the capital Rabat.

Zimbabwe’s Scott Vincent, playing with borrowed clubs and penalised two shots for arriving late on the first tee – just 30 seconds away from a DQ – shot a remarkable 68, along with Hong Kong’s Taichi Kho, Ben Campbell from New Zealand, Frenchman Sebastien Gros, Spain’s Eugenio Chacarra, Yanwei Liu from China and Japan’s Jinichiro Kozuma.

Catlin, who cruised around bogey-free like Kobori and Tabuena, has arrived in Rabat high on confidence, having made an impressive debut on the LIV Golf League last month.

The American made an eagle and five birdies, proving he is still playing to the level that saw him win the International Series Macau presented by Wynn and the Saudi Open presented by PIF back-to-back this year.

“Just very solid,” said the American, who is also second on The International Series Rankings.

“Hit a lot of really good shots. Actually left a few out there, it could have been even better, but I am very, very pleased with how I played. I am looking forward to the next three days.”

The 33-year-old, a six-timer winner on the Asian Tour, is enjoying arguably his finest season, with one reward being invites to the LIV Golf League. He finished joint 24th in Houston, tied for seventh in Nashville and will head to Valderrama next week.

“Honestly, I don’t know how I managed it because I didn’t even touch a club Tuesday. You should have seen the shots I was hitting on the range this morning but that being said, and once I got underway, I started to hit it quite nicely.” – Kazuma Kobori.

He added: “It’s just hard work and sticking to the process. I am continuing to learn from the failures from the past in order to get better. I think that's all you can ever do.”

New Zealand’s Kobori, aged just 22 is playing in his first International Series event, was unwell earlier in the week and was thrilled to have produced the goods on day one.

“Unfortunately, I got a bit ill on Tuesday and Wednesday, so I only got to play yesterday. I would’ve liked to have played it a bit more but hopefully I’ve still got three more rounds to play in which I am really looking forward to,” the Kiwi said.

“Honestly, I don’t know how I managed it because I didn’t even touch a club Tuesday. You should have seen the shots I was hitting on the range this morning but that being said, and once I got underway, I started to hit it quite nicely. Yeah, I don’t know it all just came together when I needed it to.”

He turned professional at the end of 2023 after a brilliant amateur career that saw him claim the individual title at the Eisenhower Trophy and the Australian Amateur earlier in the year. In 2019 he also won the New Zealand PGA Championship on the PGA Tour of Australia – the circuit where he won three successive titles earlier this year for his maiden wins as a professional.

Vincent was narrowly late for his tee-time as he had gone to Casablanca airport to collect his golf clubs, which like his brother Kieran, had not arrived with him. Unfortunately, the clubs had still not arrived and upon his return to Royal Golf Dar Es Salam he played with a set from the club pro plus a two-shot penalty, with his par on the first turned into a double. 

“I had zero expectations today but feel we definitely learned something that will help us to get better in the future,” he said.

The defending champion Jazz Janewattananond from Thailand signed for a 73.