Tsitsipas beat Britain's Dan Evans on the way to the final
Greek world number five Stefanos Tsitsipas won his first Masters 1000 title after beating Andrey Rublev 6-3 6-3 in the Monte Carlo Masters final.
Tsitsipas, who did not drop a set throughout the competition, needed just one hour 11 minutes to win a one-sided match against the Russian.
"I had an unbelievable week," said the 22-year-old. "I am overwhelmed by so many different emotions and nostalgia.
"I would consider it as the [best] week of my life so far."
Tsitsipas took control of both sets by breaking 23-year-old Rublev, who beat Rafael Nadal in the quarter-finals, early on.
"The clay court season couldn't have started better," added Tsitsipas, who won the end-of-season ATP Finals tournament in 2019.
"It is the best thing winning my first Masters 1000 and it is even more special doing it here on home soil in Monte Carlo [where he lives] and doing it on clay, which is my favourite surface."
Earlier on in Monte Carlo, Britain's Dan Evans and Neal Skupski missed out on a maiden doubles title together as they lost the final to Croatian second seeds Nikola Mektic and Mate Pavic.
Playing in only their second tournament as a partnership, Evans and Skupski were beaten 6-3 4-6 10-7.
They lost the Miami Open final to Mektic and Pavic earlier in April.
The victory was the Croatians' fifth ATP Tour title from six finals and they have lost just three matches this year.
"We can't get you yet, but we'll keep trying," said Evans.
On Friday, British number one Evans, 30, saw his singles run in Monte Carlo ended in the semi-finals by Tsitsipas.
Until Tuesday, he had not won a tour-level match on clay in four years, but shocked world number one Novak Djokovic on his way to the last four.