The ATP Masters 1000 series, which consists of tournaments in Indian Wells, Miami, Monte Carlo, Madrid, Rome, Coupe Rogers (alternates between Toronto and Montreal), Shanghai, and Paris-Bercy, was first introduced in 1990.
After the four Grand Slam tournaments (which award 2000 points to the winner) and the season-ending ATP Finals (which award 1500 points to an undefeated winner), the Masters 1000 series is the most prestigious on the ATP Tour, awarding 1000 points to each winner.
With the exception of Monte Carlo, Madrid and Rome, all the six other Masters 1000 tournaments are played on hardcourt. Paris-Bercy is the lone event in the tournament series which is played indoors; all the other tournaments on the Masters 1000 calendar are outdoor affairs.
Since the inception of the series exactly three decades ago, 69 different players have lifted a Masters 1000 title - the latest being Daniil Medvedev, who triumphed at 2019 Cincinnati. However, 41 of these players have never won a Grand Slam title during the course of their respective careers.
You may also like: 5 most recent players to make their Masters 1000 breakthrough
On that note, let us meet the 5 players with multiple Masters 1000 titles but who have never stood on the winner's podium at a Grand Slam tournament.
#T3 Alexander Zverev - 3 Masters 1000 titles
Alexander Zverev became the third youngest active player, and eighth overall, to win a Masters 1000 title when he beat four-time champion Novak Djokovic in the final of the 2017 Rome Masters.
The young German then went on to beat two-time champion Roger Federer in the Coupe Rogers final later that season to become one of the youngest multiple-time Masters 1000 titlists.
At the 2018 Madrid Masters, Zverev beat his good friend Dominic Thiem to emulate Federer as the only players to lift a Masters title without dropping serve.
However, on the Grand Slam scene, Zverev has only one semifinal appearance to his name - at the 2020 Australian Open, where he lost to Thiem.
You may also like: 5 lowest ranked players to win a Masters 1000 title
#T3 Nikolay Davydenko - 3 Masters 1000 titles
The Russian, along with Jim Courier (5/5), are the only players in Masters 1000 history to have won multiple titles in the tournament category and never lost a final.
Davydenko is also the only player to beat Nadal three times in a tournament final without losing one. Having beaten the Spaniard at Miami 2008, he went on to beat him again at Doha 2010.
In 50 Grand Slam appearances, the Russian's best performances are a quartet of semifinal appearances - at 2005 and 2007 Roland Garros, and 2006-07 US Open.
You may also like: Meet the 5 teenagers to have lifted a Masters 1000 title
#T3 Thomas Enqvist - 3 Masters 1000 titles
Thomas Enqvist lifted his third and last Masters 1000 title at 2000 Cincinnati with a straight-sets win over Tim Henman. It was his first title of the season and the 17th of his career.
The Swede won his two previous titles in the tournament category at 1996 Paris-Bercy and 1999 Stuttgart.
Enqvist's best performance at a Grand Slam tournament came at the 1999 Australian Open, where he squandered a set lead before losing in four to Russia's Yevgeny Kafelnikov.
You may also like: 5 lowest-ranked Grand Slam champions at the Australian Open
#2 Andriy Medvedev - 4 Masters 1000 titles
11-time titlist Andriy Medvedev won his only title of the 1997 season, and what turned out to be the last singles title of his career, at the Hamburg Masters.
The then 22-year-old beat Spaniard Felix Mantilla for the loss of just six games to win his third title at the tournament and the 4th Masters 1000 title of his career. He had previously triumphed at 1994 Monte Carlo, 1994 Hamburg and 1996 Hamburg.
In Grand Slam tournaments, Medvedev came within one set of his Major breakthrough at 1999 Roland Garros, conceding only three games in the first two sets against American Andre Agassi. But in a remarkable turnaround, Agassi took the next three sets 6-3, 6-4, 6-4 to become the first player in three decades to win the 'Career Grand Slam'.
#1 Marcelo Rios - 5 Masters 1000 titles
After making his Masters 1000 breakthrough at Monte Carlo 1997, Marcelo Rios won the Indian Wells - Miami 'Sunshine Double' in 1998.
The Chilean then followed up with the Rome Masters title later in the season. He lifted his fifth and last Masters 1000 title on the claycourts of Hamburg in 1999, with a five-set win over Mariano Zabaleta.
In his only appearance in a Grand Slam final, Rios went down to Petr Korda at the 1998 Australian Open. Rios also holds the rather ignominious record of being the only Slam-less World No. 1 in men's tennis history.