The 40-year-old scored twice in Al-Nassr's 3-0 win against Al Akhdoud on Saturday to take his tally for club and country to 956 goals.
The forward, who joined Al-Nassr in 2022, signed a new two-year deal with the Saudi Arabian club last July that takes him beyond his 42nd birthday.
Speaking after being named the Best Middle East Player at the Globe Soccer Awards in Dubai on Sunday, Ronaldo said: "It's hard to continue playing, but I am motivated.