The season-ending Next Gen Finals for men's under-21 tennis players will be held in the Saudi Arabian city of Jeddah from 2023 to 2027 as the ATP makes its first competitive foray into the Gulf country.
The award of the tournament marks the latest move in world sport by Saudi Arabia which has pumped massive amounts of money into golf and football among others in recent years, drawing some scrutiny in the process.
The hardcourt tournament, which has been played in Milan since it began in 2017, will also have its prize money increased to a record $2 million, up from $1.4 million last year.
The ATP launched a bidding process in March to evaluate host cities in several regions before finalising on the Saudi Arabian port city of Jeddah, with the King Abdullah Sports City indoor facility staging the event this year from November 28 to December 2.
"The ATP Tour is truly global and exploring new markets is central to growing the game. Bringing the Next Gen ATP Finals to Jeddah is our chance to inspire new fans, in a region with a vast young population, and unite audiences around tennis," ATP Chairman Andrea Gaudenzi said in a statement.
Gaudenzi said earlier this year there had also been positive discussions with Saudi Arabia's Public Investment Fund (PIF) and other potential investors on projects including infrastructure, events and technology investment.
World number one Carlos Alcaraz, 20, had welcomed the news then saying he had "no doubts" he would compete in Saudi Arabia at some point and added that the country has the power to hold plenty of tournaments.
Although other Gulf countries like Qatar and the United Arab Emirates have hosted ATP tournaments in the past, Saudi Arabia only had the Diriyah Tennis Cup - an exhibition tournament.
Top players including Daniil Medvedev and Stan Wawrinka had competed in that event, which held its second edition last year.
Three-times Grand Slam winner Andy Murray had previously ruled out any possibility of playing in Saudi Arabia after being invited to exhibition tournaments but said he would have to think twice if ranking points were up for grabs.