"This chapter is over," Ronaldo cryptically said on social media with a photo of him in an Al-Nassr shirt.
Ronaldo, the top scorer in this season's Saudi Pro League, has eight in seven appearances in this campaign's Champions League Elite, one short of joint-top scorers Riyad Mahrez, Salem Al-Dawsari, Anderson and Jasir Asani.
The 19-year-old forward, who trains daily alongside one of football’s all-time greats, is part of a promising Saudi Arabian generation aiming to make a statement on the global stage.
Al-Nassr remain in the third place with 54 points but they are now three points behind second-placed Al-Hilal and seven off leaders Al-Ittihad, who visit Al-Ahli on Saturday.
Cristiano Ronaldo's Saudi side Al Nassr were on Monday drawn against last season's runners-up Yokohama F-Marinos of Japan in the quarter-finals of the Asian Champions League.
Ronaldo, the Al Nassr captain, was reportedly rested for last week's goalless draw in the first leg in Iran, however returned to lead the side at Al Awwal Park.
Ronaldo turned 40 last week with his current contract due to end in June 2025.
Al Nassr captain Ronaldo had looked destined to endure a hugely frustrating game following a series of missed opportunities in the first half at Al Bayt Stadium.
The Portuguese star, without a goal in his past three appearances for the Saudi Arabian side, netted the second of the hosts' goals at Al Awwal Park in Riyadh.
The Saudi Pro League side came from behind to triumph 4-2 in the play-off at Mrsool Park, with Brazilian Anderson Talisca scoring twice and Croatia international Marcelo Brozovic rounding off the win. Nassr had been two minutes from exiting the tournament
The 31-year-old Neymar signed a two-year contract with the Riyadh-based club on Tuesday after spending six years with Paris St Germain, in a deal reportedly worth about 90 million euros ($98 million)
Cristiano Ronaldo guided 10-man Al-Nassr to their first ever Arab Club Champions Cup title after scoring twice in a 2-1 extra-time win over fellow Saudi side Al-Hilal on Saturday.
Links of Kylian Mbappe to Real Madrid, rumours of Neymar returning to Barcelona have been the commonalities of the transfer market over the past few years. This summer, however, in addition to the aforementioned sagas, the emergence of one major entity -- the Saudi Pro League -- has taken the transfer market by storm.
Cristiano Ronaldo slotted home from the spot in the final minutes to propel his Saudi Pro League side Al Nassr to their first-ever Arab Club Champions Cup final after a 1-0 win over Al Shorta in the semifinal at the Prince Sultan bin Abdul Aziz Stadium in Abha on Wednesday.
Bayern Munich's Senegal forward Sadio Mane has joined Saudi Pro League club Al-Nassr after one season with the Bundesliga champions, both clubs said on Tuesday.
Cristiano Ronaldo was replaced at half-time as Al Nassr drew 1-1 with Champions League finalists Inter Milan in the second game of their pre-season tour in Japan on Thursday.
Paris Saint-Germain's Japan tour started with a whimper on Tuesday as they played out a 0-0 draw with Cristiano Ronaldo's Al Nassr in Osaka.
Brazilian full back Alex Telles has left Manchester United to join Saudi Pro League side Al-Nassr on a contract until 2025, the two clubs announced on Sunday.
Brozovic, 30, joined Inter in 2015 and helped them win Serie A in the 2020-21 season followed by two Italian Cup trophies.
