Sinner barely gave Ruud time to breathe as he rattled off the first three games and took the first set in half an hour, before sweeping to a comprehensive victory.
World number six Casper Ruud defeated Stefanos Tsitsipas 7-5, 6-3 to win the Barcelona Open on Sunday.
Novak Djokovic admitted he was "not having a great season at all" after he was knocked out of the Monte Carlo Masters by Casper Ruud in the semi-finals.
Casper Ruud finally defeated Novak Djokovic at the sixth attempt on Saturday, setting up a Monte Carlo Masters title showdown with Stefanos Tsitsipas.
An inspired Stefanos Tsitsipas handed Jannik Sinner his second loss of the season on Saturday as the two-time champion reached the Monte Carlo Masters final 6-4, 3-6, 6-4.
Novak Djokovic created history on Sunday when he captured a record-breaking 23rd Grand Slam title with a third French Open triumph, reinforcing his case to be crowned the greatest player of all time.
Novak Djokovic admits "history is hovering" over him as he takes on Casper Ruud in the French Open final on Sunday with a men's record 23rd Grand Slam title tantalisingly close.
Ruud is through to his third Grand Slam final in his past five tournaments. He was runner-up to Rafael Nadal at Roland Garros in 2022 and then lost to Carlos Alcaraz in the US Open final.
Carlos Alcaraz defeated Frances Tiafoe in a gladiatorial US Open semi-final on Friday, setting up a showdown for the title and world number one ranking against Casper Ruud.
Casper Ruud became the first Norwegian man to reach a Grand Slam final on Friday when he set up a French Open title clash with 13-time champion Rafael Nadal, the man he described as his "idol".