Success in the Arab Club Champions Cup saw the footballing legend win his first piece of silverware at the club last weekend.
However, things aren't going to plan in the Saudi Pro League for last season's runners-up.
Ronaldo joined Al Nassr in January following a dramatic exit from Manchester United, but couldn't win the title as they finished 2nd.
Former Liverpool star Sadio Mane has also been added to their ranks, as well as Marcelo Brozovic and Alex Telles.
However, their new league campaign got off to a poor start as they lost 2-1 to Steven Gerrard's side Al Ettifaq.
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Matters were made worse on Friday night as Ronaldo and co. were unable to overcome Al Taawoun at home.
It means they remain winless in the Saudi Pro League and are just one loss away from matching their defeat record from last season.
Al Nassr ended 2022/23 with a record of 20 wins, seven draws and three defeats as Al Ittihad beat them to the title.
Against Al Taawoun, Leandre Tawamba netted the first goal after 20 minutes before the result was sealed by Ahmed Bahusayn in the eighth minute of second half stoppage time.
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Ronaldo, one of football's biggest icons, shined in his first half-season at Al Nassr as he scored 14 goals.
He already has six to his name this season thanks to his efforts in the Arab Club Champions Cup, and one fan was desperate to meet him.
In a video on X as the teams walked out from the tunnel on Friday night, a supporter can be seen running onto the pitch in the hopes of reaching Ronaldo.
They were able to evade the security's efforts to try and stop him as he closed in on the five-time Ballon d'Or winner.
However, just as he reached the star, he was dragged away by a steward and taken off the pitch.
AFC Champions League action against Dubai outfit Shabab Al Ahli is up next for Al Nassr, who will be desperate to return to winning ways.